HD404849 Datasheet, PDF (70/125 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404849 Series
TOD
Timer D interrupt
request flag (IFTD)
Timer output
control logic
Timer read
register DU (TRDU)
Timer output
control
Timer read
register DL
(TRDL)
Clock
Timer counter D
(TCD)
Overflow
EVND
Edge
detection
logic
Selector
System
clock
ø_PER
Prescaler S (PSS)
Timer write
register DU
(TWDU)
Free-running/
reload control
Timer write
register DL
(TWDL)
3
Timer mode
register D1
(TMD1)
3
Edge detection control
2
Timer mode
register D2
(TMD2)
Edge detection
selection register
2 (ESR2)
Figure 58-1 Block Diagram of Timer D (in Reload Timer and Event Counter Mode)
70