msp430f149 32768晶振插上JTAG不起振，JTAG拔下来才起振
RT，JTAG是利尔达的，难道是我最小系统板的问题？
调用的是官方例程：
//*******************************************************************************
//MSP-FET430P140 Demo - Timer_A, PWM TA1-2, Up Mode, 32kHz ACLK
//
//Description: This program generates two PWM outputs on P1.2,3 using
//Timer_A configured for up mode. The value in CCR0, 512-1, defines the PWM
//period and the values in CCR1 and CCR2 the PWM duty cycles. Using 32kHz
//ACLK as TACLK, the timer period is 15.6ms with a 75% duty cycle on P1.2
//and 25% on P1.3. Normal operating mode is LPM3.
//ACLK = TACLK = LFXT1 = 32768Hz, MCLK = default DCO ~800kHz.
////* External watch crystal on XIN XOUT is required for ACLK *//
//
// MSP430F149
// -----------------
// /|\| XIN|-
// | | | 32kHz
// --|RST XOUT|-
// | |
// | P1.2/TA1|--> CCR1 - 75% PWM
// | P1.3/TA2|--> CCR2 - 25% PWM
//
//M. Buccini
//Texas Instruments Inc.
//Feb 2005
//Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.21A
//******************************************************************************
#include<msp430x14x.h>
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
P1DIR |= 0x0C; // P1.2 and P1.3 output
P1SEL |= 0x0C; // P1.2 and P1.3 TA1/2 otions
CCR0 = 512-1; // PWM Period
CCTL1 = OUTMOD_7; // CCR1 reset/set
CCR1 = 384; // CCR1 PWM duty cycle
CCTL2 = OUTMOD_7; // CCR2 reset/set
CCR2 = 128; // CCR2 PWM duty cycle
TACTL = TASSEL_1 + MC_1; // ACLK, up mode
_BIS_SR(LPM3_bits); // Enter LPM3
}
32768没加电容
http://cache.amobbs.com/bbs_upload782111/files_36/ourdev_621328T81CNH.jpg
(原文件名:430min.jpg) 换了个目标板就能起振，看来是最小系统板的问题 JTAG 第六脚什么都不接就行，买的这种最小系统板子都这种问题 VCC不是应该接JTAG的2脚吗 lansiluotee 发表于 2012-8-28 19:27 static/image/common/back.gif
VCC不是应该接JTAG的2脚吗
不用仿真器供电的话接4脚。
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