UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 285

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

9.4.2 Clear Operation
(1) Clear operation after match with compare register and after capture operation
(2) Clear operation by CE1 bit of timer control register 1 (TMC1)
Timer register 1 (TM1) can be cleared automatically after a match with the compare register (CR1n: n = 0, 1) and a capture
operation. When a clearance source arises, TM1 is cleared to 0H on the next count clock. Therefore, even if a clearance
source arises, the value at the point at which the clearance source arose is retained until the next count clock arrives.
Timer register 1 (TM1) is also cleared when the CE1 bit of TMC1 is cleared (0) by software. The clear operation is performed
immediately after the clearance (0) of the CE1 bit.
Count Clock
INTP0
TM1
Compare Register
Count Clock
Figure 9-7 TM1 Clearance by Match With Compare Register (CR10, CR11)
(CR1n)
TM1
n–1
Figure 9-8 TM1 Clearance after Capture Operation
TM1 is captured
in CR11 here
n–1
TM1 and CR1n Match
CHAPTER 9 TIMER/COUNTER 1
n
Cleared Here
n
Cleared Here
0
n
0
1
1
2
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