CHAPTER 9 TIMER/COUNTER FUNCTION (REAL-TIME PULSE UNIT)
User’s Manual U12688EJ4V0UM00
259
(3) Timer control registers 40, 41 (TMC40, TMC41)
TMC40 and TMC41 control the operation of TM40 and TM41, respectively.
These registers can be read/written in 8- or 1-bit units.
Address
FFFFF342H
7
CE40
TMC40
6
0
5
0
4
0
3
0
2
PRS400
1
PRM401
0
PRM400
After reset
00H
FFFFF346H
CE41
TMC41
0
0
0
0
PRS410 PRM411 PRM410
00H
Bit Position
Bit Name
Function
7
CE4n
Count Enable
Controls timer operations.
0: The timer is stopped in the 0000H state and does not operate.
1: The timer performs a count operation.
2
PRS4n0
Prescaler Clock Select
Selects the internal count clock (
φ
m is the intermediate clock).
0:
φ
m/16
1:
φ
m/32
Prescaler Clock Mode
Selects the intermediate count clock ((
φ
m). (
φ
is the internal system clock).
PRM4n1
PRM4n0
φ
m
0
0
φ
/2
0
1
φ
/4
1
0
φ
/8
1
1
RFU (reserved)
1, 0
PRM4n1,
PRM4n0
Caution Do not change the count clock during timer operation.
Remark
n = 0, 1
Содержание V850E/MS1 UPD703100
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