Datasheet

Section 13 Timer Z

Rev.5.00 Nov. 02, 2005 Page 250 of 500

REJ09B0027-0500

Compare match

signal B0

FTIOB0 pin

TOCR

write signal

Set value

Bit

TOCR

000 00110

765 43210

TOD1 TOC1 TOB1 TOA1 TOD0 TOC0 TOB0 TOA0

Expected output

Remains high because the 1 writing to TOB has priority

TOCR has been set to H'06. Compare match B0 and compare match C0 are used. The FTIOB0 pin is in the 1 output state,

and is set to the toggle output or the 0 output by compare match B0.

When BCLR#2, @TOCR is executed to clear the TOC0 bit (the FTIOC0 signal is low) and compare match B0 occurs

at the same timing as shown below, the H'02 writing to TOCR has priority and compare match B0 does not drive the FTIOB0 signal low;

the FTIOB0 signal remains high.

BCLR#2, @TOCR

(1) TOCR read operation: Read H'06

(2) Modify operation: Modify H'06 to H'02

(3) Write operation to TOCR: Write H'02

Figure 13.59 When Compare Match and Bit Manipulation Instruction to TOCR

Occur at the Same Timing