HD404669 Datasheet, PDF (61/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

HD404669 Series
System reset signal
TOC
Watchdog
on flag
(WDON)
Timer output
control logic
Watchdog timer
control logic
Timer C interrupt
request flag
(IFTC)
System
clock
ø _PER
÷2
÷4
÷8
÷ 32
÷ 128
÷ 512
÷ 1024
÷ 2048
Timer read
register CL
(TRCL)
Timer read
register CU
(TRCU)
4
clock
Timer counter C
(TCCL)
(TCCU)
Overflow
4
4
Timer write register C
(TWCL)
(TWCU)
3
Timer mode
register C1
(TMC1)
3
Timer mode
Timer output control register C2
Data bus
(TMC2)
Clock line
Signal line
Figure 41 Block Diagram of Timer C
61