spd6722qcce Intel Corporation, spd6722qcce Datasheet - Page 17
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spd6722qcce
Manufacturer Part Number
spd6722qcce
Description
Isa-to-pc-card Pcmcia Controllers
Manufacturer
Intel Corporation
Datasheet
1.SPD6722QCCE.pdf
(138 pages)
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Datasheet
MEMR*
MEMW*
REFRESH*
ALE
PWRGOOD
AEN
MEMCS16*
IOCS16*
IOCHRDY
Pin Name
Table 1. ISA Bus Interface Pins (Sheet 2 of 4)
Memory Read: This input indicates that a
host memory read cycle is occurring.
Connect to ISA signal MEMR*.
Memory Write: This input indicates that a
host memory write cycle is occurring.
Connect to ISA signal MEMW*.
Refresh: This input indicates a memory
refresh cycle is occurring and will cause the
PD67XX to ignore memory accesses on the
bus. Connect to ISA signal REFRESH*.
Address Latch Enable: A high on this input
indicates a valid memory address on the
LA[23:17] bus lines. Connect to ISA signal
BALE.
Power Good: The PD67XX will be reset
when the POWERGOOD input is low.
Connect to the POWERGOOD signal from
the system power supply; or, if not available,
connect to inverted RESETDRV signal from
ISA bus.
Address Enable: This is an input from the
host CPU bus signal that distinguishes
between DMA and non-DMA bus cycles.
This input should be high for a DMA cycle
and will cause the PD67XX to ignore IOR*
and IOW* except when a PD6722 is
configured for DMA and its DREQ (IRQ10)
and DACK* (IRQ9) signals are active.
Connect to ISA signal AEN.
When PD67XX is in Suspend mode (see
“Misc Control 2” on page
high during system power-down for lowest
power consumption.
Memory Select 16: This output is an
acknowledge of 16-bit-wide access support
and is generated by the PD67XX when a
valid 16-bit-word-accessible memory
address has been decoded. Connect to ISA
signal MEMCS16*.
I/O Select 16: This output is an
acknowledge for 16-bit-wide access support
and is generated by the PD67XX when a
valid 16-bit word accessible I/O address has
been decoded. Connect to ISA signal
IOCS16*.
I/O Channel Ready: This output is driven
low by the PD67XX to lengthen host cycles.
Connect to the ISA bus IOCHRDY signal.
Description
72), pull this input
ISA-to-PC-Card (PCMCIA) Controllers — PD6710/’22
PD6710
105
141
126
127
119
83
82
99
97
Pin Number
PD6722
145
144
180
166
201
187
160
158
188
Qty.
1
1
1
1
1
1
1
1
1
O-OD
O-OD
O-TS
I/O
I
I
I
I
I
I
Pwr.
4
4
4
4
4
4
4
4
4
16 mA
16 mA
16 mA
Drive
–
–
–
–
–
–
17
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