Product manual

SanDisk Industrial Grade CompactFlash 5000 Product Manual

3.4.4

Pin Replacement Register (Address 204h in Attribute

Memory)

The Pin Replacement Register information is described below. Table 27: Pin

Replacement Changed Bit/Mask Bit Values contains pin replacement changed

bit/mask values.

Operation D7 D6 D5 D4 D3 D2 D1 D0

Read 0 0 CRdy/-Bsy CWProt 1 1 RRdy/-Bsy RWProt

Write 0 0 CRdy/-Bsy CWProt 0 0 MRdy/-Bsy MWProt

Bit Name Description

D5 CRdy/-Bsy This bit is set to "1" when the bit RRdy/-Bsy changes state. This bit

can also be written by the host.

D4 CWProt This bit is set to "1" when the RWprot changes state. This bit may

also be written by the host.

D1 RRdy/-Bsy This bit is used to determine the internal state of the Rdy/-Bsy

signal. This bit may be used to determine the state of the Ready/-

Busy as this pin has been reallocated for use as Interrupt Request

on an I/O card. When written, this bit acts as a mask for writing the

corresponding bit CRdy/-Bsy.

MRdy/-Bsy This bit acts as a mask for writing the corresponding bit CRdy/-

Bsy.

RWProt This bit is always "0" because the card does not have a write-

protect switch. When written, this bit acts as a mask for writing the

corresponding bit CWProt.

MWProt This bit when written acts as a mask for writing the corresponding

bit CWProt.

Table 27: Pin Replacement Changed Bit/Mask Bit Values

3.4.5

Socket and Copy Register (Address 206h in Attribute

Memory)

This register contains additional configuration information. This register is

always written by the system before writing the card's Configuration Index

Operation D7 D6 D5 D4 D3 D2 D1 D0

Read Reserved 0 0 Drive# 0 0 0 0

Write 0 0 0 Drive# (0) X X X X