Z86017 Datasheet, PDF (54/138 Pages) Zilog, Inc. – PCMCIA Interface Solution

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