Z8018933FSC View Datasheet(PDF) - Zilog

Part Name

Description

Manufacturer

Z8018933FSC

GENERAL-PURPOSE EMBEDDED CONTROLLERS

Zilog 

Zilog

PRELIMINARY

SYSTEM CONTROL REGISTERS

Z80189/Z8L189

GENERAL-PURPOSE EMBEDDED CONTROLLERS

OMCR

Addr 3EH

Bit M1E /M1TE /IOC -

-

-

-

-

Upon Reset 1

11

11

111

R/W R/W W R/W

I/O Compatibility

/M1 Temporary Enable

Notes:

1. This register should be programmed to 0x0xxxxxb

(x = don't care) as a part of Initialization.

2. If the M1E bit is set to 1, the processor does not

fetch a RETI instruction.

/M1 Enable

Figure 74. Operation Mode Control Register

ICR

Addr 3FH

Bit IOA7 IOA6 IOSTP -

-

-

-

-

Upon Reset

0

0

0

1

1

1

1

1

R/W R/W R/W R/W

I/O Stop

I/O Address

Combination of 11

is reserved

Figure 75. I/O Control Register

DS971890301

61

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