MC9S12P128 Datasheet, PDF (492/564 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Timer Module (TIM16B8CV2) Block Description
Table 14-22. PTPSR Field Descriptions
Field
Description
7:0
PTPS[7:0]
Precision Timer Prescaler Select Bits — These eight bits specify the division rate of the main Timer prescaler.
These are effective only when the PRNT bit of TSCR1 is set to 1. Table 14-23 shows some selection examples
in this case.
The newly selected prescale factor will not take effect until the next synchronized edge where all prescale counter
stages equal zero.
PTPS7
0
0
0
0
0
0
0
0
0
0
0
0
1
Table 14-23. Precision Timer Prescaler Selection Examples when PRNT = 1
PTPS6
0
0
0
0
0
0
0
0
0
0
0
1
1
PTPS5
0
0
0
0
0
0
0
0
0
0
1
1
1
PTPS4
0
0
0
0
0
0
0
0
0
1
1
1
1
PTPS3
0
0
0
0
0
0
0
0
1
1
1
1
1
PTPS2
0
0
0
0
1
1
1
1
1
1
1
1
1
PTPS1
0
0
1
1
0
0
1
1
1
1
1
1
1
PTPS0
0
1
0
1
0
1
0
1
1
1
1
1
1
Prescale
Factor
1
2
3
4
5
6
7
8
16
32
64
128
256
14.4 Functional Description
This section provides a complete functional description of the timer TIM16B8CV2 block. Please refer to
the detailed timer block diagram in Figure 14-30 as necessary.
S12P-Family Reference Manual, Rev. 1.12
492
Freescale Semiconductor