Datasheet

Table Of Contents
Section 11 8-Bit Timers (TMR)
Page 352 of 846 REJ09B0140-0900 Rev. 9.00
Sep 16, 2010
H8S/2215 Group
11.3.2 Time Constant Registers A (TCORA)
The TCORA_0 and TCORA_1 registers are 8-bit readable/writable registers. TCORA_0 and
TCORA_1 comprise a single 16-bit register so they can be accessed together by a word transfer
instruction. The value in TCORA is continually compared with the value in TCNT. When a match
is detected, the corresponding CMFA flag in TCSR is set to 1. Note, however, that comparison is
disabled during the T
2
state of a TCOR write cycle. The timer output (TMO) can be freely
controlled by these compare match signals and the settings of bits OS1 and OS0 in TCSR.
TCORA_0 and TCORA_1 are each initialized to H'FF.
11.3.3 Time Constant Registers B (TCORB)
The TCORB_0 registers are 8-bit readable/writable registers. TCORB_0 and TCORB_1 comprise
a single 16-bit register so they can be accessed together by a word transfer instruction. TCORB is
continually compared with the value in TCNT. When a match is detected, the corresponding
CMFB flag in TCSR is set to 1. Note, however, that comparison is disabled during the T
2
state of a
TCOR write cycle. The timer output can be freely controlled by these compare match signals and
the settings of output select bits OS3 and OS2 in TCSR. TCORB_0 and TCORB_1 are each
initialized to H'FF.