Datasheet

Section 9 Timers

Rev. 8.00 Mar. 09, 2010 Page 251 of 658

REJ09B0042-0800

Bits 3 to 0—Internal Clock Select (TMA3 to TMA0)

Bits 3 to 0 select the clock input to TCA. The selection is made as follows.

Description

Bit 3

TMA3

Bit 2

TMA2

Bit 1

TMA1

Bit 0

TMA0

Prescaler and Divider Ratio

or Overflow Period

Function

0 0 0 0 PSS, φ/8192 (initial value) Interval timer

1 PSS, φ/4096

1 0 PSS, φ/2048

1 PSS, φ/512

1 0 0 PSS, φ/256

1 PSS, φ/128

1 0 PSS, φ/32

1 PSS, φ/8

1 0 0 0 PSW, 1 s Clock time

1 PSW, 0.5 s base

1 0 PSW, 0.25 s (when using

1 PSW, 0.03125 s 32.768 kHz)

1 0 0 PSW and TCA are reset

1 0