SMCXXXAF Datasheet, PDF (19/82 Pages) Numonyx B.V – 32 Mbyte, 64 Mbyte, 128 Mbyte, 256 Mbyte and 512 Mbyte 3.3 V / 5 V supply CompactFlash™ card

SMCxxxAF
Electrical interface
Table 9. Signal description (continued)
Signal name
Direction
Pin
–WE
(PC card memory mode)
–WE
I
36
(PC card I/O mode)
–WE
(True IDE mode)
WP
(PC card memory mode)
–IOIS16
O
24
(PC card I/O mode)
–IOCS16
(True IDE mode)
Description
Driven by the host to strobe memory write data to the
registers.
Used for writing to the configuration registers.
Not used, should be connected to V_CC by the host.
No write protect switch available. It is held Low after the
completion of the reset initialization sequence.
Used for the 16 bit port (–IOIS16) function. Low indicates
that a 16 bit or odd byte only operation can be performed
at the addressed port.
Asserted Low when the card is expecting a word data
transfer cycle.
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