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MB91401
15
(Continued)
Pin name Pin no.
Polarity
I/O
Circuit
Function/application
CFCD1X 58
Nega-
tive
IN E
Card connection detect input pin : CFCD1X
Checking connection pin of the socket and CompactFlash
card. It is shown that the CompactFlash card was connected
when this signal and CFCD2X are both input by “0”.
CFVS1X 230
Nega-
tive
IN E
CF side GND input pin
GND level detection pin from CompactFlash side.
The “0” input to the pin assumes that the CompactFlash
card can operate at 3.3 V, setting the CFVCC3EX pin to the
“L” level.
CFRDY
(CFIREQ)
60
Posi-
tive
(Nega-
tive)
IN E
CF ready input pin : memory card
Ready input pin from CompactFlash memory card side
“1” : Ready
“0” : Busy
(CF interrupt : I/O card)
Interrupt request pin of CompactFlash I/O card. It is shown
the interrupt request was done from the I/O card when input
to this signal by “0”.
CFWAITX 125
Nega-
tive
IN E
Cycle wait input pin during CF execution
Cycle wait input pin from CompactFlash card side
“0” : It is shown that there is a wait demand at the cycle
under execution.
“1” : It is shown that there is no wait demand at the cycle
under execution.
CFVCC3EX 234
Nega-
tive
OUT B
CF3.3 V power enable output pin
Outputs “L” level when the CompactFlash card is operable
at 3.3 V.
The output signal enables 3.3-volt power supply to the
CompactFlash card. The pin outputs “L” level only when the
CFVS1X pin detects “0”; otherwise, the pin outputs “H”.
CFRESET 184
Posi-
tive
OUT A
CF reset output pin
Reset output pin to CompactFlash card side.
CompactFlash is reset at “H” output.
CFOEX 127
Nega-
tive
OUT B
CF read strobe output pin
Read strove output pin to CompactFlash card (memory
mode and Attribute memory area)
CFWEX 62
Nega-
tive
OUT B
CF register write output pin
Write clock output pin to CompactFlash card (register write
and Card Configuration Register area).
The register write is executed at the rising edge from “L” to
“H”.
CFIORDX 64
Nega-
tive
OUT B
CFIO read strobing output pin
Read strove output pin to CompactFlash card (I/O mode)
CFIOWRX 129
Nega-
tive
OUT B
CFIO write strobing output pin
Write strove output pin to CompactFlash card (I/O mode)
Prelminary
2004.11.12