z8l189 ZiLOG Semiconductor, z8l189 Datasheet - Page 55

• Manufacturer Part Number: z8l189
• Description: General-purpose Embedded Controllers
• Manufacturer: ZiLOG Semiconductor

DS971890301
Zilog
Figure 62. DMA I/O Address Registers
IAR1L
Read/Write
IA7
IAR1H
Read/Write
IA15
IAR1B
D7
D6
Addr 2BH
Addr 2CH
D5
Figure 64. DMA I/O Address Register Ch. 1
D4
IA0
IA8
D3
P R E L I M I N A R Y
D2
D1
Addr 2D
D0
Figure 63. DMA 1 Byte Count Registers
000 = DMA1 ext TOUT/DREQ
001 = DMA1 ASCI0
010 = DMA1 ASCI1
011 = DMA1 ext CKA0//DREQ0
111 = Reserved, do not program
Currently selected DMA
Channel when Bit 7 = 1
Alternating Channels
New Z8S180 Register
Reserved, program as 0.
0 = DMA Channels
1 = Toggle between DMA
BCR1L
Read/Write
BC7
BCR1H
Read/Write
BC15
are independent
channels for same device
G
ENERAL
-P
Addr 2EH
Addr 2FH
URPOSE
BC0
BC8
E
MBEDDED
Z80189/Z8L189
C
ONTROLLERS
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