Z86017 Datasheet, PDF (78/138 Pages) Zilog, Inc. – PCMCIA Interface Solution

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