h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 330

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 11 16-Bit Free-Running Timer
11.2.5
OCRDM is a 16-bit readable/writable register in which the upper 8 bits are fixed at H'00.
When the ICRDMS bit in TOCR is set to 1 and the contents of OCRDM are other than H'0000,
the operation of ICRD is changed to include the use of OCRDM. The point at which input capture
D occurs is taken as the start of a mask interval. Next, twice the contents of OCRDM is added to
the contents of ICRD, and the result is compared with the FRC value. The point at which the
values match is taken as the end of the mask interval. New input capture D events are disabled
during the mask interval.
A mask interval is not generated when the ICRDMS bit is set to 1 and the contents of OCRDM are
H'0000.
OCRDM is initialized to H'0000 by a reset and in hardware standby mode.
11.2.6
TIER is an 8-bit readable/writable register that enables and disables interrupts.
TIER is initialized to H'01 by a reset and in hardware standby mode.
Rev. 4.00 Jun 06, 2006 page 276 of 1004
REJ09B0301-0400
Read/
Bit
Initial
Bit
Initial value
Read/Write
value
Write
Output Compare Register DM (OCRDM)
Timer Interrupt Enable Register (TIER)
15
R
0
14
ICIAE
R
0
R/W
7
0
13
R
0
ICIBE
12
R
R/W
0
6
0
11
R
0
ICICE
R/W
10
R
0
5
0
R
9
0
ICIDE
R/W
4
0
R
8
0
R/W
7
0
OCIAE
R/W
3
0
R/W
6
0
R/W
5
0
OCIBE
R/W
2
0
R/W
4
0
R/W
3
0
OVIE
R/W
1
0
R/W
2
0
R/W
1
0
—
—
0
1
R/W
0
0