HD404459 Datasheet, PDF (62/122 Pages) Renesas Technology Corp – 4-bit HMCS400-series microcomputers

HD404459 Series
Timer B
Timer B Functions: Timer B (figure 43) has the following functions.
• Free-running/reload timer
• External event counter
• Timer output operation (toggle, 0, and 1 outputs)
TOB
EVNB
System
clock
ø _PER
Timer output
control logic
Timer B interrupt
request flag
(IFTB)
Timer read register BU (TRBU)
Timer output control
Timer read
register BL
(TRBL)
Clock
Timer/event
counter B
(TCB)
Overflow
Selector
Prescaler S (PSS)
Timer write
register BU
(TWBU)
Free-running/
Reload control
Timer write
register BL
(TWBL)
3
Timer mode
register B1
(TMB1)
2
Timer mode
register B2
(TMB2)
Figure 43 Block Diagram of Timer B
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