Z8018933ASC View Datasheet(PDF) - Zilog

Part Name

Description

Manufacturer

Z8018933ASC

GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog 

Zilog

PRELIMINARY

Z80189 MAILBOX REGISTER MAP

Register Name

Host I/O Status Register

Host Output Register 1

Host Input Register 1

Host Output Register 0

Host DMA Mailbox Cntrl Reg

Host DMA Transmit Register 1

Host DMA Receive Register 1

Host DMA Transmit Register 0

Host DMA Receive Register 0

MPU Addr/Access

%XXD5 W bit 1/R

%XXD4 R

%XXD4 W

%XXD3 R

%XXD2 R/W

%XXD1 R

%XXD1 W

%XXD0 R (1)

%XXD0 W

Z80189/Z8L189

GENERAL-PURPOSE EMBEDDED CONTROLLERS

PC Addr/Access

Prog + 10b R (2)

Prog + 01b W (2)

Prog + 01b R (2)

Prog + 00b W (2)

None

DMA1 W (3)

DMA1 R

DMA0 W

DMA0 R

1. This register is defaulted to 91h to indicate revision code.

(Z189 revision #1 - Z80189AA)

2. The PC Host Addresses are HA9:2 are programmable by writing to PADATA.

3. The HDMAT1 can be used as an extra host output mailbox register. If the Host DMA Mailbox 1 function is disabled

(bit 1 of HMC register is zero), a Host write in the programmed Mailbox range with HA1, 0=1,1 will cause the host data

to be latched into the HDMAT1 register.

Note: All register addresses not listed are Reserved.

DS971890301

63

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