NEC 78K0 Series User Manual page 186

Address: FFB7H After reset: 00H
Symbol 7
PRM01 ES111
ES111
0
0
1
1
ES011
0
0
1
1
PRM011
0
0
1
1
Note The external clock requires a pulse two cycles longer than internal clock (f
Remark f : Peripheral hardware clock frequency
PRS
186
CHAPTER 7 16-BIT TIMER/EVENT COUNTERS 00 AND 01
Figure 7-14. Format of Prescaler Mode Register 01 (PRM01)
R/W
6 5
ES110 ES011
ES110
0 Falling edge
1 Rising edge
0 Setting prohibited
1 Both falling and rising edges
ES010
0 Falling edge
1 Rising edge
0 Setting prohibited
1 Both falling and rising edges
PRM010
0 f
PRS
4
1 f /2
PRS
6
0 f /2
PRS
1 TI001 valid edge
Preliminary User's Manual U17260EJ3V1UD
4 3 2
ES010 0 0
TI011 pin valid edge selection
TI001 pin valid edge selection
Count clock selection
f = 2 MHz f = 5 MHz
PRS PRS
2 MHz 5 MHz
125 kHz 312.5 kHz
31.25 kHz 78.125 kHz
Note
1 0
PRM011 PRM010
f = 10 MHz f = 20 MHz
PRS PRS
10 MHz 20 MHz
625 kHz 1.25 MHz
156.25 kHz 312.5 kHz
).
PRS