sc9s08mz16 Freescale Semiconductor, Inc, sc9s08mz16 Datasheet - Page 172

• Manufacturer Part Number: sc9s08mz16
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Timer/PWM (S08TPMV3)
9.5
9.5.1
The TPM is reset whenever any MCU reset occurs.
9.5.2
Reset clears the TPMxSC register which disables clocks to the TPM and disables timer overflow interrupts
(TOIE=0). CPWMS, MSnB, MSnA, ELSnB, and ELSnA are all cleared which configures all TPM
channels for input-capture operation with the associated pins disconnected from I/O pin logic (so all MCU
pins related to the TPM revert to general purpose I/O pins).
9.6
9.6.1
The TPM generates an optional interrupt for the main counter overflow and an interrupt for each channel.
The meaning of channel interrupts depends on each channel’s mode of operation. If the channel is
configured for input capture, the interrupt flag is set each time the selected input capture edge is
recognized. If the channel is configured for output compare or PWM modes, the interrupt flag is set each
time the main timer counter matches the value in the 16-bit channel value register.
All TPM interrupts are listed in
that can block the interrupt request from leaving the TPM and getting recognized by the separate interrupt
processing logic.
The TPM module will provide a high-true interrupt signal. Vectors and priorities are determined at chip
integration time in the interrupt module so refer to the user’s guide for the interrupt module or to the chip’s
complete documentation for details.
9.6.2
For each interrupt source in the TPM, a flag bit is set upon recognition of the interrupt condition such as
timer overflow, channel-input capture, or output-compare events. This flag may be read (polled) by
software to determine that the action has occurred, or an associated enable bit (TOIE or CHnIE) can be set
172
Reset Overview
Interrupts
General
Description of Reset Operation
General
Description of Interrupt Operation
Interrupt
CHnF
TOF
Enable
CHnIE
Local
TOIE
Table 9-10
Counter overflow
SC9S08MZ16 MCU Data Sheet, Rev. 1
Channel event
Table 9-10. Interrupt Summary
Source
which shows the interrupt name, the name of any local enable
Set each time the timer counter reaches its terminal
count (at transition to next count value which is
usually 0x0000)
An input capture or output compare event took
place on channel n
Description
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