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16.2.2
Output Comparing Registers A and B (OCRA and OCRB)
Output comparing register AH and BH (OCRAH and OCRBH)
Output comparing register AL and BL (OCRAL and OCRBL)
Bit :
15
1
Initial value :
R/W
R/W :
The OCR consists of twin 16-bit read/write registers (OCRA and OCRB). The contents of the
OCR are always being compared with the FRC and, when the value of these two match, the OCFA
and OCRB of the TCSRX will be set to 1. At this time, if the OCIAE and OCIB of the TIER are
being set to 1, an interrupt request will be issued to the CPU.
When performing compare matching, if the OEA and OEB of the TOCR are set to 1, the level
value set to the OLVLA and OLVLB of the TOCR will be output through the FTOA and FTOB
pins. After resetting, 0 will be output through the FTOA and FTOB pins until the first compare
matching occurs.
Reading/writing can be made from and to the OCR through the CPU at 8-bit or 16-bit.
The OCR is cleared to H'FFFF when reset or under the standby mode, watch mode, subsleep
mode, module stop mode or subactive mode.
Rev. 1.0, 02/00, page 318 of 1141
14
13
12
11
1
1
1
1
R/W
R/W
R/W
R/W
R/W
OCRAH, OCRBH
OCRA, OCRB
10
9
8
7
6
1
1
1
1
1
R/W
R/W
R/W
R/W
5
4
3
2
1
1
1
1
R/W
R/W
R/W
R/W
R/W
OCRAL, OCRBL
1
0
1
1
R/W
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