HD404639R Datasheet, PDF (69/135 Pages) Renesas Technology Corp – 4-Bit Single-Chip Microcomputer

HD404639R Series
Timer C
Timer C Functions: Timer C has the following functions.
• Free-running/reload timer
• Watchdog timer
• Timer output operation (toggle, 0, 1, and PWM outputs)
The block diagram of timer C is shown in figure 51.
Watchdog on
flag (WDON)
System
reset signal
Watchdog timer
control logic
Timer C interrupt
request flag
(IFTC)
TOC
System ^øPER
clock
Timer output
control logic
Timer read register CU (TRCU)
Timer output
control
Timer read
register CL
(TRCL)
Clock
Timer counter C
(TCC)
Overflow
Selector
Prescaler S (PSS)
Timer write
register CU
(TWCU)
Free-running
/Reload control
Timer write
register CL
(TWCL)
3
Timer mode
register C1
(TMC1)
3
Timer mode
register C2
(TMC2)
Figure 51 Block Diagram of Timer C
67