Hi, Sreerama,
This is the PTC3 function:
B8 PTC3/
LLWU_P7
CMP1_IN1 CMP1_IN1 PTC3/
LLWU_P7
SPI0_PCS1 UART1_RX FTM0_CH2 CLKOUT I2S0_TX_BCLK
if you want to configure the PTC3 as CLKOUT pin, this is the procedure:
1)Enable portC gated clock
SIM_SCGC5|=0x800; //set the PORTC bit, bit 12
2)set MUX bits in the PORTC_PCR3
PORTC_PCR3&=0x700;
PORTC_PCR3|=5<<8; //ALT5 is CLKOUT
3)set the CLKOUTSEL bits in SIM_SOPT2 to output different clcok
CLKOUT select
Selects the clock to output on the CLKOUT pin.
000 FlexBus CLKOUT
001 Reserved
010 Flash clock
011 LPO clock (1 kHz)
100 MCGIRCLK
101 RTC 32.768kHz clock
110 OSCERCLK0
Hope it can help you
BR
Xiangjun Rong
