Time Constant Register B (Tcorb); Timer Control Register (Tcr) - Renesas H8SX/1650 Hardware Manual

11.3.3

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 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 T2 state of a TCORB write
cycle. The timer output from the TMO pin can be freely controlled by this compare match signal
(compare match B) and the settings of bits OS3 and OS2 in TCSR. TCORB is initialized to H'FF.
Bit 7 6
Bit Name
Initial Value 1 1
R/W R/W R/W
11.3.4

Timer Control Register (TCR)

TCR selects the TCNT clock source and the condition for clearing TCNT, and enables/disables
interrupt requests.
7
Bit
CMIEB
Bit Name
0
Initial Value
R/W
R/W
Bit Bit Name
7 CMIEB
TCORB_0
5 4 3 2
1 1 1 1
R/W R/W R/W R/W
6 5
CMIEA OVIE
0 0
R/W R/W
Initial
Value R/W Description
0 R/W Compare Match Interrupt Enable B
Selects whether CMFB interrupt requests (CMIB) are
enabled or disabled when the CMFB flag in TCSR is set
to 1.
0: CMFB interrupt requests (CMIB) are disabled
1: CMFB interrupt requests (CMIB) are enabled
1 0 7 6
1 1 1 1
R/W R/W R/W R/W
4 3
CCLR1 CCLR0
0 0
R/W R/W
Rev.2.00 Jun. 28, 2007 Page 417 of 666
Section 11 8-Bit Timers (TMR)
TCORB_1
5 4 3 2
1 1 1 1
R/W R/W R/W R/W
2 1
CKS2 CKS1
0 0
R/W R/W
REJ09B0311-0200
1 0
1 1
R/W R/W
0
CKS0
0
R/W