idp_notes.txt

来自「u-boot-1.1.6 源码包」· 文本 代码 · 共 47 行

Notes on the Vibren PXA255 IDP.

Chip select usage:

CS0 - flash
CS1 - alt flash (Mdoc or main flash)
CS2 - high speed expansion bus
CS3 - Media Q, low speed exp bus
CS4 - low speed exp bus
CS5 - low speed exp bus
  - IDE: offset 0x03000000 (abs: 0x17000000)
  - Eth: offset 0x03400000 (abs: 0x17400000)
  - core voltage latch: offset 0x03800000 (abs: 0x17800000)
  - CPLD: offset 0x03C00000 (abs: 0x17C00000)

PCMCIA Power control

MAX1602EE w/ code pulled high (Cirrus code)
vx = 5v
vy = 3v

			Bit pattern
			PWR 3,2,1,0
vcc	     vpp	A1VCC  A0VCC   A1VPP   A0VPP
=====================================================
0	     0            0      0       0       0	0x0
3 (vy)	     0            1      0       1       1	0xB
3 (vy)	     3 (vy)       1      0       0       1	0x9
3 (vy)	     12(12in)     1      0       1       0	0xA
5 (vx)	     0            0      1       1       1	0x7
5 (vx)	     5 (vx)       0      1       0       1	0x5
5 (vx	     12(12in)     0      1       1       0	0x6

Display power sequencing:

- VDD applied
- within 1sec, activate scanning signals
- wait at least 50mS - scanning signals must be active before activating DISP

Signal mapping:
Schematic            LV8V31 signal name
=========================================
LCD_ENAVLCD		DISP
LCD_PWR			Applies VDD to board

Both of the above signals are controlled by the CPLD