OX16CF950 datasheet(18/60 Pages) ETC

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OXCF950 DATA SHEET V1.1

OXFORD SEMICONDUCTOR LTD.

written by the host.

CREADY

This bit is set (1) when the corresponding bit, RREADY, changes state. This bit may also be

written by the host.

CWProt

This bit is set (1) when the corresponding bit, RWProt, changes state. This bit may also be

written by the host.

RBVD1

When read, this bit represents the internal state of the Battery Voltage Detect circuits which

would be on the BVD1 pin.

When this bit is written as 1 the corresponding CBVD1 bit is also written. When this bit is

written as 0, the CBVD1 bit is unaffected.

RBVD2

When read, this bit represents the internal state of the Battery Voltage Detect circuits which

would be on the BVD2 pin.

When this bit is written as 1 the corresponding CBVD2 bit is also written. When this bit is

written as 0, the CBVD2 bit is unaffected.

RREADY

When read, this bit represents the internal state of the READY signal. This bit may also be

used to determine the state of READY as that pin has been relocated for use as Interrupt

Request on IO Cards.

When this bit is written as 1 the corresponding “changed” bit is also written. When this bit is

written as 0, the “changed” bit is unaffected.

RWProt

When read, this bit represents the state of the WP signal. This signal may also be used to

determine the state of the Write Protect switch when pin 33 is being used for IOIS16#.

When this bit is written as 1 the corresponding “changed” bit is also written. When this bit is

written as 0, the “changed” bit is unaffected.

Table 16: Pin Replacement Register

5.5.4

Socket and Copy Register ‘SCR’ (Offset 0xFE)

This is an optional read/write register, implemented by the OXCF950, which the PCMCIA/CF card may use to distinguish

between similar cards installed in a system. This register is always written by the system before writing the card's Function

Configuration Index field in the Configuration Option register.

Reserved

Copy Number

Socket Number

Field

Description

Reserved

This bit is reserved for future standardization. This bit must be set to zero (0) by software when

the register is written.

Copy Number

PCMCIA/CF cards that indicate in their CIS that they support more than one copy of identically

configured cards, should have a copy number (0 to MAX twin cards, MAX = n-1) written back

to the socket and Copy register.

This field indicates to the card that it is the n’th copy of the card installed in the system, which

is identically configured. The first card installed receives the value 0. This permits identical

cards designed to share a common set of I/O ports while remaining uniquely identifiable and

consecutively ordered.

Socket Number

This field indicates to the PCMCIA/CF card that it is located in the n’th socket. The first socket

is numbered o. This permits any cards designed to do so to share a common set of I/O ports

while remaining uniquely identifiable.

Table 17: Socket and Copy Register

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