Z86M1720ASC View Datasheet(PDF) - Zilog

Part Name

Description

Manufacturer

Z86M1720ASC

PCMCIA Interface Solution

Zilog 

Z86017/Z16017 PCMCIA Interface Solution

Product Specification

64

EEPROM Register

Address: SELECT 26h

Name: Bus Control 1 Register

Type: Read/Write

Reset: 00h

Table 48. Bus Control 1 Register: Address 26h

Bit Placement Bit Name

Bit 0

DISABLE_CLK

Bit 1

Bit 3-2

EN_IOIS_IN

8-Bit_CNTRL

Description

When this bit is set to 1, it turns off the PC_MCLK_IN

pad. When it is cleared, it enables the PC_MCLK_IN pad.

This bit is automatically cleared when in MASTER mode

and at any access to the EEPROM command Register 7F4h

as seen through the PCMCIA interface.

When this bit is set to 1, it enables the IOIS16 signal to be

generated internally (see Register 27, IOIS16 Address

Control Register, Table 49). When it is cleared, the source

for IOIS16 will be the ATA_IOIS16 input.

PCMCIA 8- to 16-bit control enable (see Table 51).

PS012002-1201

Programming Internal Registers

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