S912XEG128J2VAL
Model | S912XEG128J2VAL |
Description | IC,MICROCONTROLLER,16-BIT,CPU12 CPU,CMOS,QFP,112PIN,PLASTIC |
PDF file | Total 1327 pages (File size: 7M) |
Chip Manufacturer | ROCHESTER |
Chapter 14 Enhanced Capture Timer (ECT16B8CV3)
14.3.2.26 Precision Timer Prescaler Select Register (PTPSR)
Module Base + 0x002E
7
6
5
4
3
2
1
0
R
W
Reset
PTPS7
0
PTPS6
0
PTPS5
0
PTPS4
0
PTPS3
0
PTPS2
0
PTPS1
0
PTPS0
0
Figure 14-48. Precision Timer Prescaler Select Register (PTPSR)
Read: Anytime
Write: Anytime
All bits reset to zero.
Table 14-32. PTPSR Field Descriptions
Field
7:0
PTPS[7:0]
Description
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 14-33
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.
Table 14-33. Precision Timer Prescaler Selection Examples when PRNT = 1
PTPS7
0
0
0
0
0
0
0
0
0
0
0
0
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
MC9S12XE-Family Reference Manual Rev. 1.19
Freescale Semiconductor
555
Because of an order from the United States International Trade Commission, BGA-packaged product lines and part numbers indicated here currently are not
available from Freescale for import or sale in the United States prior to September 2010: S12XE products in 208 MAPBGA packages