TPMx_SC field descriptions (continued)
Field
Description
0
TPM counter has not overflowed.
1
TPM counter has overflowed.
6
TOIE
Timer Overflow Interrupt Enable
Enables TPM overflow interrupts.
0
Disable TOF interrupts. Use software polling or DMA request.
1
Enable TOF interrupts. An interrupt is generated when TOF equals one.
5
CPWMS
Center-Aligned PWM Select
Selects CPWM mode. This mode configures the TPM to operate in up-down counting mode.
This field is write protected. It can be written only when the counter is disabled.
0
TPM counter operates in up counting mode.
1
TPM counter operates in up-down counting mode.
4–3
CMOD
Clock Mode Selection
Selects the TPM counter clock modes. When disabling the counter, this field remain set until
acknolwedged in the TPM clock domain.
00
TPM counter is disabled
01
TPM counter increments on every TPM counter clock
10
TPM counter increments on rising edge of TPM_EXTCLK synchronized to the TPM counter clock
11
Reserved.
PS
Prescale Factor Selection
Selects one of 8 division factors for the clock mode selected by CMOD.
This field is write protected. It can be written only when the counter is disabled.
000
Divide by 1
001
Divide by 2
010
Divide by 4
011
Divide by 8
100
Divide by 16
101
Divide by 32
110
Divide by 64
111
Divide by 128
29.4.2 Counter (TPMx_CNT)
The CNT register contains the TPM counter value.
Reset clears the CNT register. Writing any value to COUNT also clears the counter.
When debug is active, the TPM counter does not increment unless configured otherwise.
Reading the CNT register adds two wait states to the register access due to
synchronization delays.
Memory Map and Register Definition
KL27 Sub-Family Reference Manual , Rev. 5, 01/2016
464
Freescale Semiconductor, Inc.
