HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 281

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

DMAWER is an 8-bit readable/writable register that controls enabling or disabling of writes to
DMACR, DMABCR, and DMATCR by the DTC.
DMAWER is initialized to H'00 by a reset, and in hardware standby mode.
Bits 7 to 4—Reserved: Read-only bits, always read as 0.
Bit 3—Write Enable 1B (WE1B): Enables or disables writes to all bits in DMACR1B, bits 11, 7,
and 3 in DMABCR, and bit 5 in DMATCR, by the DTC.
Bit 3
WE1B
0
1
Bit 2—Write Enable 1A (WE1A): Enables or disables writes to all bits in DMACR1A, and bits
10, 6, and 2 in DMABCR, by the DTC.
Bit 2
WE1A
0
1
Bit
Initial value :
R/W
Description
Writes to all bits in DMACR1B, bits 11, 7, and 3 in DMABCR, and bit 5 in DMATCR
are disabled
Writes to all bits in DMACR1B, bits 11, 7, and 3 in DMABCR, and bit 5 in DMATCR
are enabled
Description
Writes to all bits in DMACR1A, and bits 10, 6, and 2 in DMABCR are disabled
Writes to all bits in DMACR1A, and bits 10, 6, and 2 in DMABCR are enabled
:
:
—
—
7
0
—
—
6
0
Section 7 DMA Controller (Not Supported in the H8S/2321)
—
—
5
0
—
—
4
0
Rev.6.00 Sep. 27, 2007 Page 251 of 1268
WE1B
R/W
3
0
WE1A
R/W
2
0
REJ09B0220-0600
WE0B
R/W
1
0
(Initial value)
(Initial value)
WE0A
R/W
0
0