3 16-bit pc card interface signals – Ricoh R5C841 User Manual
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R5C841 PCI-CardBus/IEEE 1394/SD Card/Memory Stick/xD/ExpressCard Data Sheet
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2004 R
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. 1.10
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3.3.3 16-bit PC Card Interface signals
Pin Name
Type
Description
16-bit PC Card Interface Pin Descriptions
CDATA [15:0]
I/O
16-bit Card DATA BUS SIGNALS [15:0]: Input buffer is disabled when the card socket
power supply is off or card is not inserted.
CADR [25:0]
OUT (TS)
16-bit Card ADDRESS BUS SIGNALS [25:0]:
IORD#
OUT (TS)
16-bit Card I/O READ:
IOWR#
OUT (TS)
16-bit Card I/O WRITE:
OE#
OUT (TS)
16-bit Card OUTPUT ENABLE:
WE#
OUT (TS)
16-bit Card WRITE ENABLE:
CE1#
OUT (TS)
16-bit Card CARD ENABLE 1:
CE2#
OUT (TS)
16-bit Card CARD ENABLE 2:
REG#
OUT (TS)
16-bit Card ATTRIBUTE MEMORY SELECT: This signal selects Attribute Memory
access or common memory access during 16bit memory cycle. Attribute memory
access is selected when this signal is “low” and common memory access is selected
when this signal is “high”.
READY/
IREQ#
IN
16-bit Card READY/BUSY or INTERRUPT REQUEST: This signal has two different
functions. READY/BUSY# input on the memory PC card, and IREQ# input on the I/O
card.
WP/
IOIS16#
IN
16-bit Card WRITE PROTECT or CARD IS 16-BIT PORT: This signal has two different
functions. Write Protect Switch input on the memory PC card, and IOIS16 input on the
I/O card.
RESET
OUT (TS)
16-bit Card CARD RESET:
WAIT#
IN
16-bit Card BUS CYCLE WAIT:
BVD1/
STSCHG#/
RI#
IN
16-bit Card BATTERY VOLTAGE DETECT 1 or STATUS CHANGE: This signal has
three different functions. The battery voltage detect input 1 on the memory PC card, and
Card Status Change#/Ring Indicate# input on the I/O card.
BVD2/
SPKR#/
LED
IN
16-bit Card BATTERY VOLTAGE DETECT 2 or DIGITAL AUDIO or LED INPUT: This
signal has three different functions. The battery voltage detect input 2 on the memory
PC card, and SPEAKER# input or LED input on the I/O card.
INPACK#
IN
16-bit Card INPUT ACKNOWLEDGE:
CD1#
IN
16-bit Card CARD DETECT 1: CD [2:1]# pins are used to detect the card insertion. CD
[2:1]# pins are used in conjunction with VS [2:1] to decode card type information.
CD2#
IN
16-bit Card CARD DETECT 2: CD [2:1]# pins are used to detect the card insertion. CD
[2:1]# pins are used in conjunction with VS [2:1] to decode card type information.
VS1
I/O
16-bit Card CARD VOLTAGE CAPABILITY SENSE 1: VS [2:1] pins are used in
conjunction with CD [2:1]# to decode card type information.
VS2
I/O
16-bit Card CARD VOLTAGE CAPABILITY SENSE 2: VS [2:1] pins are used in
conjunction with CD [2:1]# to decode card type information.