mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 350
mc9s12xs128
Manufacturer Part Number
mc9s12xs128
Description
Hcs12 Microcontrollers 16-bit Automotive Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12XS128.pdf
(738 pages)
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Periodic Interrupt Timer (S12PIT24B4CV1)
12.1.4
Figure 12-1
12.2
The PIT module has no external pins.
350
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Bus Clock
Run mode
This is the basic mode of operation.
Wait mode
PIT operation in wait mode is controlled by the PITSWAI bit located in the PITCFLMT register.
In wait mode, if the bus clock is globally enabled and if the PITSWAI bit is clear, the PIT operates
like in run mode. In wait mode, if the PITSWAI bit is set, the PIT module is stalled.
Stop mode
In full stop mode or pseudo stop mode, the PIT module is stalled.
Freeze mode
PIT operation in freeze mode is controlled by the PITFRZ bit located in the PITCFLMT register.
In freeze mode, if the PITFRZ bit is clear, the PIT operates like in run mode. In freeze mode, if the
PITFRZ bit is set, the PIT module is stalled.
External Signal Description
Block Diagram
shows a block diagram of the PIT module.
Micro Timer 0
Micro Timer 1
8-Bit
8-Bit
Micro Time
Base 0
Micro
Time
Base 1
S12XS Family Reference Manual, Rev. 1.10
Figure 12-1. PIT24B4C Block Diagram
16-Bit Timer 0
16-Bit Timer 1
16-Bit Timer 2
16-Bit Timer 3
Time-Out 0
Time-Out 1
Time-Out 2
Time-Out 3
Interface
Interface
Interface
Interface
Freescale Semiconductor
Interrupt 0
Trigger 0
Interrupt 1
Trigger 1
Interrupt 2
Trigger 2
Interrupt 3
Trigger 3
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