upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 162

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(4) Prescaler mode registers 0, 01 (PRM0, PRM01)
162
PRM0 and PRM01 select the count clock of the 16-bit timer (TM0) and the valid edge of TI0n input. PRM0 and
PRM01 are set by an 8-bit memory manipulation instruction.
RESET input clears PRM0 and PRM01 to 00H.
Remark
After reset: 00H R/W
PRM01
After reset: 00H R/W
PRM0
n = 0, 1
Note The external clock requires a pulse longer than two internal clocks (f
PRM02
ES011
ES011
ES001
7
0
7
0
0
1
1
0
0
1
1
0
0
0
0
1
1
1
1
PRM01
ES010
ES010
ES000
6
0
6
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
CHAPTER 7 TIMER/COUNTER FUNCTION
Falling edge
Rising edge
Setting prohibited
Both rising and falling edges
Falling edge
Rising edge
Setting prohibited
Both rising and falling edges
PRM00
ES001
User’s Manual U12768EJ4V1UD
5
0
5
0
1
0
1
0
1
0
1
Address: FFFFF20EH
Address: FFFFF206H
f
f
INTWTI
TI00 valid edge
f
f
f
Setting prohibited
XX
XX
XX
XX
XX
ES000
/2
/16
/4
/64
/256
4
0
Count Clock
4
Selection of Valid Edge of TI01
Selection of Valid Edge of TI00
Note
3
0
3
0
Count Clock Selection
100 ns
800 ns
200 ns
3.2
12.8
20 MHz 17 MHz 10 MHz 2 MHz
−
−
−
µ
µ
s
2
0
s 15.1
2
0
118 ns
941 ns
235 ns
3.8
−
−
−
µ
s
µ
PRM01
s 25.6
f
XX
1
0
1
200 ns
1.6
400 ns
6.4
−
−
−
µ
µ
s
s
µ
XX
s 128
PRM02
PRM00
/2).
1
8
2
32
0
µ
µ
µ
0
µ
s
s
s
−
−
−
s
µ
s