HD64F38602R Datasheet, PDF (177/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Section 9 Timer B1
Section 9 Timer B1
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 9.1 shows a block diagram of timer B1.
9.1 Features
• Selection of eight internal clock sources (φ/8192, φ/2048, φ/256, φ/64, φ/16, φ/4, φ_W/1024, and
φ_W/256).
• An interrupt is generated when the counter overflows.
• Use of module standby mode enables this module to be placed in standby mode independently
when not used. (Timer B1 is halted as the initial value. For details, refer to section 5.4, Module
Standby Function.)
TMB1
φ
PSS
φw
1/4
PSW
φw/4
[φw/1024, φw/256]
TCB1
TLB1
[Legend]
TMB1: Timer mode register B1
TCB1: Timer counter B1
TLB1: Timer load register B1
IRRTB1: Time B1 interrupt request flag
PSS: Prescaler S
PSW: Prescaler W
Figure 9.1 Block Diagram of Timer B1
IRRTB1
Rev. 3.00 May 15, 2007 Page 145 of 516
REJ09B0152-0300