Z86M1720ASC 查看數據表（PDF） - Zilog

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Z86M1720ASC

PCMCIA Interface Solution

Zilog 

Z86017/Z16017 PCMCIA Interface Solution

Product Specification

40

Table 13. Interrupt Enable Register: Address 01h (Continued)

Bit Placement Bit Name

Bit 6

CCR0_OVERIDE

Bit 7

EN_INPACK

Description

ATA_DASP is used as a DASP pin. Also see Register 02h.

Card Con•guration Register 0 is normally written after

Power-On Reset by the PCMCIA host. If Interrupts are

allowed by the local processor or EEPROM, then the

PCMCIA READY/BSY signal is configured as an

interrupt signal only when the Card Configuration Register

is written. If the local processor does not require the

PCMCIA host to write to CCR0, bit CCR0_OVERIDE can

be set to force the internal logic to select the PCMCIA

READY/BSY as the Interrupt pin, if interrupts are enabled.

This bit is active when set to 1. On Power-On Reset, set

this bit to 0, no override selected. PCMCIA host must

select interrupts and write to the Card Con•guration

Register 0.

Enable PCMCIA Input acknowledge when set to 1. On

Power-On Reset, this bit is set to 0.

PS012002-1201

Programming Internal Registers

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