smc256af Numonyx, smc256af Datasheet - Page 17

• Manufacturer Part Number: smc256af
• Description: 32 Mbyte, 64 Mbyte, 128 Mbyte, 256 Mbyte And 512 Mbyte 3.3 V / 5 V Supply Compactflash? Card
• Manufacturer: Numonyx

SMCxxxAF
Table 9.
–IORD
(PC card memory mode)
–IORD
–IORD
–CD1, –CD2
(PC card memory mode)
–CD1, –CD2
(PC card I/O mode)
–CD1, –CD2
(True IDE mode)
–CE1, –CE2
(PC card memory mode)
–CE1, –CE2
(PC card I/O mode)
–CS0, –CS1
(True IDE mode)
–CSEL
(PC card memory mode)
–CSEL
–CSEL
–IOWR
(PC card memory mode)
–IOWR
–IOWR
–OE
(PC card memory mode)
–OE
–ATASEL
(True IDE mode)
(PC card I/O mode)
(True IDE mode)
(PC card I/O mode)
(True IDE mode)
(PC card I/O mode)
(True IDE mode)
(PC card I/O mode)
Signal name
Signal description (continued)
I
O
I
I
I
I
Direction
34
26,25
7,32
39
35
9
Pin
Not used.
I/O Read strobe generated by the host. It gates I/O data
onto the bus.
Same as PC card I/O mode.
These are connected to ground on the card. They are
used by the host to determine that the card is fully inserted
into its socket.
Same for all modes.
Same for all modes.
Used to select the card and to indicate whether a byte or a
word operation is being performed. –CE2 accesses the
odd byte, –CE1 accesses the even byte or the odd byte
depending on A0 and –CE2. A multiplexing scheme based
on A0, –CE1, –CE2 allows 8 bit hosts to access all data on
D0 to D7.
Same as PC card memory mode.
CS0 is the chip select for the task file registers, while CS1
selects the Alternate Status register and the Device
Control register.
Not used.
Not used.
This internally pulled up signal is used to configure the
card as a master or slave. When grounded it is configured
as a master, when open it is configured as a slave.
Not used.
The I/O Write strobe pulse is used to clock I/O data on the
bus into the Card Controller registers. Clocking occurs on
the rising edge.
Same as PC card I/O mode.
This is an Output Enable strobe generated by the host
interface. It reads data and the CIS and Configuration
registers.
Reads the CIS and Configuration registers.
Grounded by the host.
Description
Electrical interface
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