Datasheet

Section 11 8-Bit Timer (TMR)
Rev. 3.00 Sep. 28, 2009 Page 215 of 710
REJ09B0384-0300
11.2.2 Time Constant Register A (TCORA)
TCORA is an 8-bit readable/writable register. TCORA_0 and TCORA_1 comprise a single 16-bit
register, so they can be accessed together by word access. TCORA is continually compared with
the value in TCNT. When a match is detected, the corresponding compare-match flag A (CMFA)
in TCSR is set to 1. Note however that comparison is disabled during the T2 state of a TCORA
write cycle. TCORA is initialized to H'FF.
TCORA_Y can be accessed when the TMRX/Y bit in TCONRS is 1. TCORA_X can be accessed
when the TMRX/Y bit in TCONRS is 0. See section 11.2.6, Timer Connection Register S
(TCONRS).
11.2.3 Time Constant Register B (TCORB)
TCORB is an 8-bit readable/writable register. TCORB_0 and TCORB_ 1 comprise a single 16-bit
register, so they can be accessed together by word access. TCORB is continually compared with
the value in TCNT. When a match is detected, the corresponding compare-match flag B (CMFB)
in TCSR is set to 1. Note however that comparison is disabled during the T2 state of a TCORB
write cycle. TCORB is initialized to H'FF.
TCORB_Y can be accessed when the TMRX/Y bit in TCONRS is 1. TCORB_X can be accessed
when the TMRX/Y bit in TCONRS is 0. See section 11.2.6, Timer Connection Register S
(TCONRS).