sl811hs_appnote.txt

CYPRESS SL811HS 应用笔记

SL811HS/SL811HST Application Notes

Cypress Semiconductor Corporation . 3901 North First Street . San Jose . CA 95134 . 408-943-2600 
Cypress Semiconductor Corporation 
SL811HS and SL811HST: Application Notes 
Conventions .................................................................................................................................5Definitions.....................................................................................................................................5References:..................................................................................................................................5Revision History...........................................................................................................................5
1. Introduction.......................................................................................................................6

1.1. OVERVIEW......................................................................................................................... 6
2. SL811HS Host or Slave MODE ....................................................................................7

2.1. OVERVIEW......................................................................................................................... 7
2.2. HARDWARE REQUIREMENTS ................................................................................................. 7
2.1.1 External Controller and USB connectors...................................................................7

2.3. POWER ON AND RESET MODE..............................................................................................7
2.4. SWITCHING LOGIC............................................................................................................... 9
2.5. SOFTWARE INITIALIZATION...................................................................................................10
2.5.1 Initialization from Host to Slave ...............................................................................11

2.5.2 Initialization from Slave to Host...............................................................................12

2.6. M/S PIN (PIN27/PIN40) .......................................................................................................13
2.7. PULL-UP/DOWN REGISTERS ON USB LINES ............................................................................13
2.8. HOST/SLAVE DETECTOR .....................................................................................................13
3. Programming Information ............................................................................................15

3.1. HOST AND DEVICE PROGRAMMING.......................................................................................15
3.2. SL811HS USB CONTROL REGISTERS .................................................................................15
3.3. SL811HS MEMORY MAP ................................................................................................16

3.3.1 Control Registers.....................................................................................................17

3.3.2 Memory Buffer..........................................................................................................18

3.4. INTERRUPT STATUS REGISTER.............................................................................................19
4. SL811HS host software................................................................................................20

4.1. SOFTWARE APPLICATION.............................................................................................20

4.1.1 Single Write Operation.............................................................................................20

4.1.2 Single Read Operation.............................................................................................21

4.1.3 Memory Test............................................................................................................21

4.1.4 USB Reset...............................................................................................................22

4.1.5 CRC5/16 Generation ...............................................................................................23

4.1.6 Zero Length Packet..................................................................................................23

4.1.7 Double Buffer Operation..........................................................................................23

4.1.8 Single IN Packet.......................................................................................................24

4.1.9 Single OUT Packet ..................................................................................................25

4.1.10 Short Data Packet....................................................................................................25

4.1.11 USB Device Detection.............................................................................................26

4.1.12 Full/Low Speed Detect.............................................................................................26

4.1.13 SOF or EOP Generation..........................................................................................28

4.1.14 Suspend State..........................................................................................................30

4.1.15 Resume Wakeup.....................................................................................................30

4.1.16 Specific Command Transfer....................................................................................31

4.1.17 USB Transfer (Bulk/ISO/Control/Interrupt)..............................................................31

4.1.18 Device Enumeration.................................................................................................32

5. SL811HS usb transfer ..................................................................................................33

5.1. CONTROL TRANSFER..........................................................................................................36
SL811HS and SL811HST: Application Notes  
5.1.1  SETUP Transaction ................................................................................................. 37  
5.1.2  Control Read ............................................................................................................ 37  
5.1.3  Control Write ............................................................................................................ 39  

5.2. 
BULK TRANSFER................................................................................................................40

5.2.1 BULK Write..............................................................................................................40

5.2.2 BULK Read..............................................................................................................41


6. 
Error Recovery Management......................................................................................42



6.1. SL811HS ERROR CONDITIO NS ...........................................................................................42
6.2. DATA TOGGLE ERROR........................................................................................................42
6.3. BUS TIMEOUT ERROR.........................................................................................................43
6.4. BABBLE AND LOSS OF ACTIVITY (LOA)..................................................................................43
Figure 1: SL811HS circuit diagram.................................................................................................... 9Figure 2: SL811HS Host/Slave diagram............................................................................................10Figure 3: SL811HS Internal Memory Map ........................................................................................16Figure 4: Zero Length Data Packet....................................................................................................23Figure 5: EOP Pulse Width ..............................................................................................................28Figure 6: Token Phase......................................................................................................................29Figure 7: Data Phase........................................................................................................................29Figure 8: Handshaking phase............................................................................................................29
Table 1: SL811HS and PC address....................................................................................................16Table 2: USB Control Register Memory............................................................................................17Table 3: SL811HS Control Register Memory Map.............................................................................17Table 4: DATA0/DATA1 Mapping ..................................................................................................18Table 5: Buffers use for configuration and Vendor Specific command ................................................18Table 6: SL811HS Code Bit Definitions............................................................................................18Table 7: Error Conditions .................................................................................................................42
Program Sample 1: Single Write Function.........................................................................................20Program Sample 2: Write Buffer Function.........................................................................................21Program Sample 3: Single Read Function..........................................................................................21Program Sample 4: Read Buffer Function .........................................................................................21Program Sample 5: Memory Test......................................................................................................21Program Sample 6: USB Reset Function ...........................................................................................22Program Sample 7: Data, Endpoint, and Address ...............................................................................23Program Sample 8: Single IN Packet.................................................................................................24Program Sample 9: Single OUT Packet.............................................................................................25Program Sample 10: Short Data Packet.............................................................................................26Program Sample 11: Speed Detect Function ......................................................................................27Program Sample 12: Hardware EOP Generation................................................................................29Program Sample 13: Suspend State...................................................................................................30Program Sample 14: Resume Wakeup...............................................................................................30Program Sample 15: Vendor Command ............................................................................................31Program Sample 16: Vendor Command ............................................................................................31Program Sample 17: USB Control Transfer.......................................................................................31Program Sample 18: Device Enumeration .........................................................................................32Program Sample 19: Device Enumeration .........................................................................................32
USB Trace 1: USB Reset.................................................................................................................23USB Trace 2: IN Packet...................................................................................................................24USB Trace 3: OUT Packet...............................................................................................................25USB Trace 4: SOF Packet................................................................................................................29USB Trace 5: EOP Packet................................................................................................................30USB Trace 6: SETUP Transaction ....................................................................................................37USB Trace 7: IN Transaction from Device to Host ............................................................................37USB Trace 8: OUT Transaction from Host to Device.........................................................................39USB Trace 9: OUT Transaction from Host to Device.........................................................................39USB Trace 10: Bulk Write ...............................................................................................................40USB Trace 11: Bulk Read................................................................................................................41
CONVENTIONS 
1,2,3,4	Numbers without annotations are decimals. 
Dh, 1Fh, 39h	Hexadecimal numbers are followed by an “h”. 
0101b, 010101b	Binary numbers are followed by a “b”. 
bRequest, nWords in italics indicate terms defined by USB Specification or by this Specification. 
SL811HS	refers to SL811HS in either 28PLCC or SL811HST - 48LPQFP package. 

DEFINITIONS 
USBUniversal Serial Bus 

REFERENCES: 
[Ref 1]  SL811HS Specification [Ref 2]  USB Specification 1.1[Ref 3] Human Interface Device support for SL811HS (sl811hs_hid_hub.pdf)[Ref 4]  Host Debugger Document (host_debugger.pdf)
Please direct any questions about this document to [e-mail]

REVISION HISTORY 1. INTRODUCTION 
Name and Version  Date Issue  Description  Author/Revise  
First Draft  Sept 26, 2000  Created  TBN  
Second Draft  10/24/2000  Bernie  
Preliminary  02/02/01  Added USB software Tech. support  TBN  
Version 1.13  02/06/2001  Version 1.13  KPS  
Version 1.16  02/15/2001  Preliminary release  Bernie+TBN+KPS  
Version 1.17-1.19  05/17/2001  Add handle USB hub & low speed  TBN  
Version 1.21  12/12/2001  Changed name & logos to Cypress  SIK  

1.1.Overview 
The SL811HS USB Host Controller is a single chip USB embedded host device that can communicate with either full or low speed USB peripherals. The SL811HS can interface to devices such as microprocessors, microcontrollers, DSP’s, or to a variety of buses such as ISA, PCMCIA and others. The SL811HS is suitable for use in a variety of embedded systems that require configurable USB host or device features. Typical applications include: Personal Digital Assistants (PDA), Set-top boxes, POS, Medical Test Instruments, Digital Video or Still Cameras, Scanners, Printers, Mobile/Cellular Phones, Game devices, etc. 

Host and Slave Application Example Host Application Example 
Cypress Semiconductor Corporation 
SL811HS and SL811HST: Application Notes 

2. SL811HS HOST OR SLAVE MODE 
2.1.Overview 
The SL811HS supports both USB Host and USB Slave modes.  These modes are selectable by a single pin that can be permanently connected to ground for Host mode, or left unconnected for Slave mode. Optionally, the Mode Select pin can be driven by a GPIO pin of a host CPU thus allowing software selection of the USB Host/Slave modes.  In certain applications, the user may need to support both Host and Slave modes with a single SL811HS controller. The following will describe an application whereby the SL811HS can be utilized to support both modes.  A schematic diagram is provided (Figure 1: SL811HS circuit diagram) to illustrate a possible implementation. 

2.2.Hardware requirements 
There is a minimum set of requirements to implement the host/slave functions with a single SL811HS. These are described below in Table 1 below. 
2.1.1 External Controller and USB connectors 
The application requires an external microcontroller that can provide at least two 3.3V GPIO lines to control the Host/Slave mode pin, and sufficient power to supply to the USB connector when Host mode is enabled. 
The USB 1.1 specification requires the use of different USB connectors for Host and Slave ports, and specific termination resistors for each port. The schematic diagram (Figure 2: SL811HS circuit diagram/Figure 2: SL811HS host/slave diagram) illustrates the requirements for each mode. 


2.3.Power On and Reset Mode 
The SL811HS needs to be reset and reconfigured when switched to different modes. The SL811HS has a hardware RESET input that can be used rather than recycling power on/off whenever the mode switch is initiated. For instance, when switching to the Host mode, after the hardware reset, the user sets bit 7 = ‘1’ of Control2 Register (cSOFcnt =0x0F), SL811HS will be in host mode. Please note when both Host and Slave USB connectors are present as shown in the diagram, only one device can be attached at any one time. The following summary of actions has to be accomplished in switching between modes: 
Host Mode: -Pin M/S must set low -Issue HW reset. -Set bit-7=1 of cSOFcnt register -Data+ - switch pull-up 1.5K ohms resistor to disconnect -Data+ and Data- switch pull-down 15k ohm resistors to ground -Provide power to pin-1 of USB connector 
Slave Mode: 
-Pin M/S must set high.-Issue HW reset.-Data+ - switch pull-up 1.5K ohm resistor to Vdd. -Data+ and Data- switch pull-down 15K ohm resistors to disconnect.-Disconnect power from pin-1 of USB connector.
Cypress Semiconductor Corporation 
SL811HS and SL811HST: Application Notes 

2.4.Switching Logic 
The schematic diagrams illustrate a possible implementation using open collector logic devices to switch the pull-up and pull-down resistors, an inverter and a power switch. 

Circuit 
1 
2 

3 
H = HIGH Logic Level

L = LOW Logic Level

X = Either LOW or HIGH Logic Level

C A Y HI-Z = 3-STATE (outputs are disabled)

Figure 1: SL811HS circuit diagram 
.2001 Cypress Semiconductor Corporation.  All rights reserved. The information  Date: 07/26/01  
and specifications contained in this document are subject to change without  Revision: 1.21  
notice.  Page:9  

NOTE:
CONNECT EXTERNAL DEVICE TO EITHER JP1 OR JP2.
NEVER CONNECT TO BOTH SIMULTANEOUSELY.

External CPU GPIO

U2 

Figure 2: SL811HS Host/Slave diagram 

2.5.Software Initialization 
Cypress provides Host and Slave code in development Kit. To switch Host/Slave mode, you need to write an appropriate value to the register 0FH of SL811HS. After writing value to register 0FH, you need to do Initialization. 
.2001 Cypress Semiconductor Corporation.  All rights reserved. The information  Date: 07/26/01  
and specifications contained in this document are subject to change without  Revision: 1.21  
notice.  Page:10  

2.5.1	Initialization from Host to Slave 
This software initialization is on SL811HS slave mode. This assumes hardware is already configured slave mode. 
-Power up-Config slave mode
o Write value “0x00” to register 0FH-Memory Test-Slave Initialization:
o Reset chip 

oDisable Interrupt Enable. Write value “0x00” to register 06H

oSetup USB Address. Write value “0x00” to register 07H

oSetup endpoint 0 address starts at 0x40. Write value “0x40’ to register 01H

oSetup transfer length of endpoint 0. Write value “0x40” to register 12H

oSet Arm and direction bit. Write value “0x03” to register 00H

Endpoint 1 Set A: 

oSetup address Endpoint 1 starts at 0x60. Write value “0x60” to register 11H

oSetup endpoint 1 transfer length . Write value “0x40” to register 12H

oSet Arm and direction bit. Write value “0x03” to register 10H

Endpoint 2 Set A and B: 

oSetup Endpoint2A address starts at 0x80. Write value “0x80” to register 21H

oSetup Endpoint2B address starts at 0xC0. Write value “0xC0” to register 29H

oSetup Endpoint2A transfer length . Write value “0x40” to register 22H

oSet Arm and direction bit. Write value “0x03” to register 10H

oInterrupt Enable for Endpoint 0, 1, 2, SOF and USB reset . Write value “0x67” to register 06H 

oEnable USB Transfer. Write value “0x01” to register 05H

oClear Interrupt Status. Write value “0xFF” to register 0DH



2.5.2	Initialization from Slave to Host 
This software initialization is on SL811HS host mode. This assumes hardware is already configured host mode. 
-Power up-Config host mode
o Write value “0xAE” to register 0FH-Enable power to USB device -Delay for hardware stable before detect USB device

o Delayms (25,0); // Delay 25 mili-second-Memory Test-Host Initialization:

o Hardware reset chip 

o Interrupt Enable on set USB_AB, Insert/Remove, and USB Reset 

oUSB Reset, set full speed, and clock 12/48 Mhz mode . Write a value “0x48” to register 05H 

oDisable USB Transfer and SOF generation. Write a value “0x00” to register 05H




-Full/Low Speed Detection 
oIf bit-7 of Interrupt Status (0DH) equal 0, it is Low speed device. . Write value “0xFF” to register 0EH . Write value “0x0E” to register 0EH . Write value “0x21” to register 05H 

oIf bit- 7 of Interrupt Status (0DH) equal 1, then it is Full speed device. . Write value “0xAE” to register 0EH . Write value “0x0E” to register 0EH . Write value “0x05” to register 05H 

oOtherwise if there is no power or no device attach clear Interrupt Status . Write value “0xFF” to register 0DH 


-Generate SOF to USB device 
o Write a value “0x50” to register 00H 

o Write a value “0x00” to register 04H 

o Write a value “0x01” to register 00H 

o Delayms (10,0); // Delay 10 mili-second 


-Delay for Hardware stable before enumeration 
Cypress Semiconductor Corporation 
SL811HS and SL811HST: Application Notes 


2.6.M/S pin (pin27/pin40) 
It is recommended that M/S pin is “NC”. If you want to set the “Host” or “Slave” mode as power-on-default, you need to make M/S pin be tied to 
Mode 
M/S pin 
Host 
GND 
Slave 
VCC3.3 
2.7.Pull-up/down registers on USB linesA 1.5K pull-up resister is required for “Slave” mode, a 15K pull-down resisters is required for“Host” mode. You will need to enable/disable each registers. NOTE: See the “SL811HS and SL811HST Application Notes page.8” for more details.
2.8.Host/Slave detectorSince the SL811HS does not have a mechanism to know if the inserted device is operating as “Host” or as “Slave”, you need to add a Host/Slave detector. Following are examples of this.(Example.1) Using 2 different cable with special connectors either “Host” or “Slave” Connector for Host (pin5 and 6 are inter-connected.)

1. CPU_GPIO detects that a cable is for “Host”.
 2. Start supplying USB Bus power. Connector for Slave 
USB Bus power switch