Z86017 Datasheet, PDF (96/138 Pages) Zilog, Inc. – PCMCIA Interface Solution

Z86017/Z16017 PCMCIA Interface Solution
Product Specification
82
EEPROM Register
Address: SELECT 0Ch
Name: PCMCIA Pin Replacement Register CCR2
Type: Write/Read
Table 66. PCMCIA Pin Replacement Register CCR2: Address 0Ch
Bit Placement Bit Name
Bit 0
Bit 1
RWPROT
RRDY//BSY
Bit 2
RBVD2
Bit 3
RBVD1
Bit 4¹
Bit 5¹
CWPROT
CRDY//BSY
Bit 6¹
CBVD2
Bit 7¹
CBVD1
NOTES:
1. When this register is read, these four bits are reset.
Description
Write Protect switch.
When read, this bit represents the internal state of the
RRDY/BSY signal. When written, this bit acts as a
mark for writing the corresponding bit CRDY/BSY.
When read, this bit represents the internal state of the
Battery Voltage detection circuits on cards which
contain a battery. This signal represents the values on
PCMCIA pin BVD2. Also see Register 2Ch
(Table 54).
When read, this bit represents the internal state of the
Battery Voltage detection circuits on cards which
contain a battery. This signal represents the values on
PCMCIA pin BVD1. Also see Register 2Ch
(Table 54).
This bit is set to 1 when RWPROT changes state.
This bit is set to 1 when the bit RRDY//BSY changes
state.
This bit is set to 1 when the corresponding bit
RBVD2 changes state.
This bit is set to 1 when the corresponding bit
RBVD1 changes state.
PS012002-1201
Configuration Registers