MPC5604B/C Microcontroller Reference Manual, Rev. 8
588 Freescale Semiconductor
The LDVAL registers must be set as follows:
• LDVAL for Timer 1 is set to 0x0003E7FF
• LDVAL for Timer 3 is set to 0x0016E35F
The interrupt for Timer 1 is enabled by setting TIE in the TCTRL1 register. The timer is started by writing
a 1 to bit TEN in the TCTRL1 register.
Timer 3 shall be used only for triggering. Therefore Timer 3 is started by writing a 1 to bit TEN in the
TCTRL3 register; bit TIE stays at 0.
The following example code matches the described setup:
// turn on PIT
PIT_CTRL = 0x00;
// Timer 1
PIT_LDVAL1 = 0x0003E7FF; // setup timer 1 for 256000 cycles
PIT_TCTRL1 = TIE; // enable Timer 1 interrupts
PIT_TCTRL1 |= TEN; // start timer 1
// Timer 3
PIT_LDVAL3 = 0x0016E35F; // setup timer 3 for 1500000 cycles
PIT_TCTRL3 = TEN; // start timer 3
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