SH7108 Datasheet, PDF (160/560 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 8 Multifunction Timer Pulse Unit (MTU)
8.3.2 Timer Mode Register (TMDR)
The TMDR registers are 8-bit readable/writable registers that are used to set the operating mode of
each channel. The MTU has five TMDR registers, one for each channel. TMDR register settings
should be changed only when TCNT operation is stopped.
Initial
Bit Bit Name value
7, 6 —
All 1
5
BFB
0
4
BFA
0
3
MD3
0
2
MD2
0
1
MD1
0
0
MD0
0
R/W
—
R/W
R/W
R/W
R/W
R/W
R/W
Description
Reserved
These bits are always read as 1. The write value should
always be 1.
Buffer Operation B
Specifies whether TGRB is to operate in the normal
way, or TGRB and TGRD are to be used together for
buffer operation. When TGRD is used as a buffer
register, TGRD input capture/output compare is not
generated.
In channels 1 and 2, which have no TGRD, bit 5 is
reserved. It is always read as 0, and the write value
should always be 0.
0: TGRB and TGRD operate normally
1: TGRB and TGRD used together for buffer operation
Buffer Operation A
Specifies whether TGRA is to operate in the normal
way, or TGRA and TGRC are to be used together for
buffer operation. When TGRC is used as a buffer
register, TGRC input capture/output compare is not
generated.
In channels 1 and 2, which have no TGRC, bit 4 is
reserved. It is always read as 0, and the write value
should always be 0.
0: TGRA and TGRD operate normally
1: TGRA and TGRC used together for buffer operation
Modes 3 to 0
These bits are used to set the timer operating mode.
See table 8.9 for details.
Rev.1.00 Sep. 18, 2008 Page 126 of 522
REJ09B0069-0100