HD404318 Datasheet, PDF (36/68 Pages) Hitachi Semiconductor – 4-bit HMCS400-series microcomputer

HD404318 Series
Interrupt request
flag of timer B
(IFTB)
EVNB
Edge
detector
System
clock
ø_PER
2
Timer read
register BU
(TRBU)
Timer read
register B lower
(TRBL)
Clock
Free-running
timer control
signal
Timer counter B
(TCB)
Timer write
register B upper
(TWBU)
Overflow
Selector
Timer write
register B lower
(TWBL)
3
Prescaler S (PSS)
Edge detection control signal
Timer mode
register B1
(TMB1)
Timer mode
register B2
(TMB2)
Figure 24 Timer B Free-Running and Reload Operation Block Diagram
34