Hi all:
I meet a problem on MSP430F4152 MCU about LCD Driving. I use MSP430F4152 's internal charge pump to generate Vlcd. Here is my code:
void LCD_Init(void)
{
//Setup Sx PIN
P5SEL |= BIT7 + BIT6 + BIT5 + BIT4; //COM0 ~ COM3
//Enable LCD Sx PIN func
P4SEL = 0xFF;
P2SEL = 0xFF;
//LCDA : ACLK / 128 + 4-MUX + LCD SEG ON + LCD MODULE ON
LCDACTL = LCDFREQ_128 + LCD4MUX + LCDON;
//LCDA Port Ctrl: S0 ~ S7 + S16 ~ S23
LCDAPCTL0 = LCDS0 + LCDS4 + LCDS8 + LCDS12; // Enable LCD S0 ~ S15 4COM
LCDAPCTL1 = 0;
LCDAVCTL0 = LCDCPEN; //Enable internal LCD charge pump
LCDAVCTL1 = VLCD_1; //Vlcd = 2.6V is enough
}
and I connect a 10uF Cap on PIN LCDCAP (PIN 43) to ground.
I think the voltage on PIN LCDCAP should be 2.6V after these config, but the voltage on this PIN is about 4.4V ~ 4.8V when MCU running in full speed, and then all LCD Seg light.But when I run MCU step by step, the voltage on this PIN is then 2.6V and LCD display OK. Can anybody share me a hand? Thanks very much.
