CHAPTER 7 16-BIT TIMER/EVENT COUNTERS 00 AND 01
Preliminary User’s Manual U17260EJ3V1UD
185
Figure 7-13. Format of Prescaler Mode Register 00 (PRM00)
Address: FFBBH After reset: 00H R/W
Symbol
7 6 5 4 3 2 1 0
PRM00 ES101 ES100 ES001 ES000
0
0 PRM001
PRM000
ES101
ES100
TI010 pin valid edge selection
0 0
Falling
edge
0 1
Rising
edge
1 0
Setting
prohibited
1
1
Both falling and rising edges
ES001
ES000
TI000 pin valid edge selection
0 0
Falling
edge
0 1
Rising
edge
1 0
Setting
prohibited
1
1
Both falling and rising edges
Count clock selection
PRM001 PRM000
f
PRS
= 2 MHz
f
PRS
= 5 MHz
f
PRS
= 10 MHz f
PRS
= 20 MHz
0 0
f
PRS
2 MHz
5 MHz
10 MHz
20 MHz
0 1
f
PRS
/2
2
500 kHz
1.25 MHz
2.5 MHz
5 MHz
1 0
f
PRS
/2
8
7.81 kHz
19.53 kHz
39.06 kHz
78.12 kHz
1 1
TI000
valid
edge
Note
Note
The external clock requires a pulse two cycles longer than internal clock (f
PRS
).
Remark
f
PRS
: Peripheral hardware clock frequency
Содержание 78K/0 Series
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