HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 222

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

9.3
9.3.1
Timer B1 is an 8-bit timer that increments each time a clock pulse is input. This timer has two
operation modes, interval and auto reload.
Features
Features of timer B1 are given below.
Block Diagram
Figure 9.2 shows a block diagram of timer B1.
214
Choice of seven internal clock sources (ø/8192, ø/2048, ø/512, ø/256, ø/64, ø/16, ø/4) or an
external clock (can be used to count external events).
An interrupt is requested when the counter overflows.
ø
TMIB
Legend:
TMB1:
TCB1:
TLB1:
IRRTB1:
PSS:
Timer B1
Overview
Timer mode register B1
Timer counter B1
Timer load register B1
Timer B1 interrupt request flag
Prescaler S
PSS
Figure 9.2 Block Diagram of Timer B1
TMB1
TCB1
TLB1
IRRTB1