spd6722qcce Intel Corporation, spd6722qcce Datasheet - Page 21

• Manufacturer Part Number: spd6722qcce
• Description: Isa-to-pc-card Pcmcia Controllers
• Manufacturer: Intel Corporation

Datasheet
-WE
-IORD
-IOWR
WP/
-IOIS16 †
-INPACK †
RDY/
-IREQ †
-WAIT †
Pin Name
1.
2.
1
A_A[25:0] and B_A[25:0] are the independent address buses to the sockets.
2
Table 2. Socket Interface Pins (Sheet 2 of 4)
To differentiate the sockets, all PD6722 pin names have either A_ or B_ prepended to the pin names indicated. For example,
When a socket is configured as an ATA drive interface, socket interface pin functions change. See
1
Write Enable: For non-DMA transfers,
this signal goes active (low) to indicate
a memory write to the socket.
During a DMA read (when -IOWR is
active), this signal goes low if the ISA
output TC is active (high), indicating to
the card that the system’s terminal
count signal is active. During DMA
writes (when -IORD is active), this
output remains high.
I/O Read: This output is driven low for I/
O reads from the socket.
I/O Write: This output is driven low for I/
O writes to the socket.
Write Protect / I/O Is 16-Bit: In
Memory Card Interface mode (Interrupt
and General Control register, bit 5 is
equal to ‘0’), this input is the status of
the PC card write protect switch.
In I/O Card Interface mode, a low on
this input indicates that the I/O address
being accessed is capable of 16-bit
operation.
In DMA mode, this pin can be
programmed as the -DREQ input from
a DMA-capable PC Card.
Input Acknowledge: This input
indicates to the PD67XX that the PC
Card supports I/O access at the current
address. A PC Card activates this input
during IORD cycles to which the card
can respond.
In DMA mode, this pin can be
programmed as the -DREQ input from
a DMA-capable PC Card.
Ready / Interrupt Request: In Memory
Card Interface mode, this input is
readable as the status of bit 5 of the
Interface Status register, which is
used by a PC Card to signal system
software of its ready or busy state.
In I/O Card Interface mode, this active-
low input indicates an interrupt request.
Wait: This input indicates to the
PD67XX that the current card access
cycle is to be extended until this signal
becomes inactive (high).
Description
2
PD6710
ISA-to-PC-Card (PCMCIA) Controllers — PD6710/’22
37
28
30
69
57
39
55
Pin Number
Socket A
37
26
29
68
56
39
54
PD6722
Socket B
131
119
101
116
99
90
92
Qty.
1
1
1
1
1
1
1
Table 17 on page
O-TS
O-TS
O-TS
I-PU
I-PU
I-PU
I-PU
I/O
2 or 3
2 or 3
2 or 3
2 or 3
2 or 3
2 or 3
2 or 3
Pwr.
88.
Drive
2 mA
2 mA
2 mA
–
–
–
–
21