Datasheet

Section 10 Timer B1
Rev. 4.00 Mar. 15, 2006 Page 143 of 556
REJ09B0026-0400
Section 10 Timer B1
The timer B1 is an 8-bit timer that increments each time a clock pulse is input. This timer has two
operating modes, interval and auto reload. Figure 10.1 shows a block diagram of the timer B1.
10.1 Features
• Selection of seven internal clock sources (φ/8192, φ/2048, φ/512, φ/256, φ/64, φ/16, and φ/4) or
an external clock (can be used to count external events).
• An interrupt is generated when the counter overflows.
[Legend]
TMB1 :
φ
TMIB1
TCB1 :
Timer mode register B1
Timer counter B1
TLB1 :
IRRTB1 :
Timer load register B1
Timer B1 interrupt request flag
PSS :
TMIB1 :
Prescaler S
Timer B1 event input
Internal data bus
TCB1
TMB1
PSS
TLB1
IRRTB1
Figure 10.1 Block Diagram of Timer B1