HD404849 Datasheet, PDF (65/125 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404849 Series
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
65