msp430x22x4_tb_12.c

关于msp430f2274的官方最近提供的程序

//******************************************************************************
//   MSP430F22x4 Demo - Timer_B, PWM TB1-2, Up Mode, HF XTAL ACLK
//
//   Description: This program generates two PWM outputs on P4.1,2 using
//   Timer_B configured for up mode. The value in TBCCR0, 512-1, defines the PWM
//   period and the values in TBCCR1-2 the PWM duty cycles. Using HF XTAL ACLK
//   as TBCLK, the timer period is HF XTAL/512 with a 75% duty cycle on P4.1
//   and 25% on P4.2.
//   ACLK = MCLK = TBCLK = HF XTAL
//   //* HF XTAL REQUIRED AND NOT INSTALLED ON FET *//
//   //* Min Vcc required varies with MCLK frequency - refer to datasheet *//
//
//                MSP430F22x4
//             -----------------
//         /|\|              XIN|-
//          | |                 | HF XTAL (3