h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 219

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

10.3.2
The TMDR registers are 8-bit readable/writable registers that are used to set the operating mode of
each channel. The TPU has six TMDR registers, one for each channel. TMDR register settings
should be changed only when TCNT operation is stopped.
Bit
7, 6
5
4
3
2
1
0
Bit Name
BFB
BFA
MD3
MD2
MD1
MD0
Timer Mode Register (TMDR)
Initial value
All 1
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Reserved
These bits are always read as 1 and cannot be
modified.
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, 2, 4, and 5, which have no TGRD, bit
5 is reserved. It is always read as 0 and cannot be
modified.
0: TGRB operates normally
1: TGRB and TGRD used together for buffer
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, 2, 4, and 5, which have no TGRC, bit
4 is reserved. It is always read as 0 and cannot be
modified.
0: TGRA operates normally
1: TGRA and TGRC used together for buffer
Modes 3 to 0
These bits are used to set the timer operating mode.
MD3 is a reserved bit. In a write, it should always be
written with 0. See table 10.11 for details.
operation
operation
Section 10 16-Bit Timer Pulse Unit (TPU)
Rev. 3.00 Oct 04, 2005 page 179 of 598
REJ09B0155-0300