HD404369 Datasheet, PDF (61/117 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer

Input capture
status flag
(ICSF)
Error
controller
Input capture
error flag
(ICEF)
HD404369 Series
Interrupt request
flag of timer B
(IFTB)
EVNB
Edge
detector
Read
signal
Timer read
register B upper
(TRBU)
Timer read
register B lower
(TRBL)
Clock
Input capture
timer control
signal
Timer counter B
(TCB)
Overflow
Selector
System
clock
ø_PER
Prescaler S (PSS)
3
Timer mode
register B1
(TMB1)
2
Edge detection control signal
Timer mode
register B2
(TMB2)
Figure 39 Timer B Input Capture Operation Block Diagram
Registers for Timer B Operation: By using the following registers, timer B operation modes are selected
and the timer B count is read and written.
 Timer mode register B1 (TMB1: $009)
 Timer mode register B2 (TMB2: $026)
 Timer write register B (TWBL: $00A, TWBU: $00B)
 Timer read register B (TRBL: $00A, TRBU: $00B)
 Port mode register B (PMRB: $024)
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