Z8018220ASC View Datasheet(PDF) - Zilog

Part Name

Description

Manufacturer

Z8018220ASC

ZILOG INTELLIGENT PERIPHERAL CONTROLLER (ZIP™)

Zilog 

Zilog

FREE RUNNING COUNTER

PRELIMINARY

FRC

Read Only

Addr 18H

76 543 210

Figure 32. Free Running Counter

CPU CONTROL REGISTER

CPU Control Register (CCR) Addr 1FH

D7 D6 D5 D4 D3 D2 D1 D0

000 00 000

Figure 33. CPU

Note: See Figure 49 for full description.

DMA REGISTERS

SAR0L

Read/Write

SA7

Addr 20H

SA0

SAR0H

Read/Write

SA15

Addr 21H

SA8

SAR0B

Read/Write

Addr 22H

SA19 SA16

- ---

Bits 0-2 (3) are used for SAR0B

A19, A18, A17, A16 DMA Transfer Request

x x 0 0 /DREQ0 (external)

x x 0 1 RDR0 (ASCI0)

x x 1 0 RDR1 (ASCI1)

x x 1 1 Not Used

Figure 34. DMA 0 Source Address Registers

Z80182/Z8L182

ZILOG INTELLIGENT PERIPHERAL

3-38

PS009801-0301

DS971820600

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