z80180 ZiLOG Semiconductor, z80180 Datasheet - Page 66

• Manufacturer Part Number: z80180
• Description: Microprocessor Unit
• Manufacturer: ZiLOG Semiconductor

DMA Memory Address Register, Channel 1H
DMA
DMA I/O Address Register Channel 1
PS014004-1106
DMA Memory Address Register, Channel 1H
DMA Memory Address Register, Channel 1B
Mnemonic MAR1H: Address 29h
Mnemonic MAR1B (Address 2A)
(
may also be a destination or source I/O address. The
register contains 16 bits of I/O address; its most significant byte identifies the
HANDSHAKE
All bits in
IAR1: I/O ADDRESS = 2Bh to 2Dh
Figure 59. DMA Memory Address Register, Channel 1H
Figure 60. DMA Memory Address Register, Channel 1B
IAR1B
signal and controls the Alternating Channel feature.
—
7
reset to
—
—
6
3
—
0
—
.
2
5
—
—
—
DMA Memory Channel B Address
4
1
) specifies the I/O address for channel 1 transfers, which
—
—
DMA Memory Address
3
0
—
2
—
1
—
0
Microprocessor Unit
REQUEST
Architecture
Z80180
60