我已解決了, 謝謝.
原來是ICD3的VDD也要接3.3V才可以.

我有把0.1uF去掉, 但插入時偵測得到device, 要燒錄時卻又偵測不到.

""
MPLAB ICD 3 Connected.
ICD3Err0045: You must connect to a target device to use
MPLAB ICD 3.

Target Detected
Device ID Revision = 00000003

Programming...

Failed to get Device Id.
Programming failed
""

您好
目前使用PIC18F65J50開發產品,
但接上ICD3後出現以下訊息:
""MPLAB ICD 3 detected
Connecting to MPLAB ICD 3...
Firmware Suite Version...... 01.25.10
Firmware type......................PIC18FJ
MPLAB ICD 3 Connected.
ICD3Err0045: You must connect to a target device to use
MPLAB ICD 3.

Target Detected

ICD3Err0035: Failed to get Device ID""

MCU VDD 3.3V, VDDCORE 3.3V, AVDD 3.3V,
MCLR, PGC, PGD都有確實接到MCU,
VDD接10K電阻再街0.1uF電容,
兩個元件中間再接一470 ohm電阻到MCLR,
另外ISP CONNECT PIN2 5V, PIN3 GND,
請問問題是出在那, 還有增加迴路嗎?

這個動作我已做過了,
是照著流程跑的沒錯

我試了
但結果還是0x61

我的return 是5 or 0,
根i無關

您好:
我目前使用APP023 v8.0 + MPLAB c18 V3.34開發,
我在main底下呼叫一個副程式, 不管副程式的回傳值如何變化,得到的值永遠是0x61, 是設定上問題嗎?

void main( void )
{
unsigned char k;
..
TouKey_Write(0x05, i);
k = TouKey_Read(0x08, 2);
if (k != 0)
{
setcurGLCD(3,0) ;
putrsGLCD( "Touch ") ;
My_Temp = I2CReDa1[0];
setcurGLCD(3,3) ;
itoa(My_Temp , TempASCII) ;
putsGLCD(TempASCII) ;

My_Temp = I2CReDa1[1];
setcurGLCD(3,5) ;
itoa(My_Temp , TempASCII) ;
putsGLCD(TempASCII) ;
}
...
}

unsigned char TouKey_Read(unsigned char address, unsigned char lenth)
{
char i;

I2CTrDa1[0] = 0x00; // Start Process2
I2CTrDa1[1] = address; // Address
i = I2CByteWri1(0xE0, 2);
if (i!=0)
{
putrsUART1( "ERROR: TouKey Read Fail") ;
return 5;
}
I2CCurrRead1(0xE0, lenth);
return 0;
}

感謝各位大大詳細的回答, 已獲得解答, 謝謝.

請問各位大大 :
我FOLLOWMPLAB C18編譯器用戶指南.pdf的範例程式做測試(程式碼如下), COMPILER IS OK, 但是在做軟體模擬時卻遇到不會進入中斷服務程式的情形, TIMER0OVERFLOW前後相關FSR SATUS如下:

Setup 完畢, timer0溢位前
T0CON = 0x9F
INTCON = 0xA0
RCON = 0x0C

timer0計數至0xFFFFh, 溢位後
T0CON = 0x9F
INTCON = 0x24
RCON = 0x0C
TMR0H = 0xFF
TMR0L = 0x7F

程式中沒有改變INTCON的指令, 為何在溢位後會改變其值, 致使無法進入中斷服務常式?
P.S. 我用MICROCHIP C18 TOOLSUIT FOR COMPILER, WATCHDOG DISABLE.

#include <p18cxxx.h>
#include <timers.h>

#define NUMBER_OF_LEDS 8

void timer_isr (void);

static unsigned char s_count = 0;

#pragma code low_vector=0x18
void low_interrupt (void)
{
_asm GOTO timer_isr _endasm
}

#pragma code

#pragma interruptlow timer_isr
void timer_isr (void)
{
static unsigned char led_display = 0;

INTCONbits.TMR0IF = 0;

s_count = s_count % (NUMBER_OF_LEDS + 1);

led_display = (1 << s_count++) - 1;

PORTB = led_display;
}

void main (void)
{
TRISB = 0;
PORTB = 0;

OpenTimer0 (TIMER_INT_ON & T0_SOURCE_INT & T0_16BIT);
INTCONbits.GIE = 1;

while (1)
{
}
}