ISA-to-PC-Card (PCMCIA) Controllers
—
PD6710/
’
22
Datasheet
25
Table 6
below summarizes the pin usage.
3.4
Power-On Configuration Summary
On the rising edge of PWRGOOD, the PD67XX latches the configuration pin SPKR_OUT*/
C_SEL to determine which sockets are addressed by this device. A
‘
1
’
on the SPKR_OUT*/
C_SEL pin will cause the device to address Socket 0 (and Socket 1 for the PD6722). A
‘
0
’
on this
pin will cause the device to address Socket 2 (and Socket 3 for the PD6722).
Table 5. Power and Ground Pins
Pin Name
Description
Pin Number
Qty.
I/O
Pwr.
Drive
PD6710
PD6722
+5V
This pin is connected to the system
’
s 5-volt
power supply. In systems where 5 volts is not
available, this pin can be connected to the
system
’
s 3.3-volt supply (but 5-volt-only PC
Cards will not be supported).
1
208
1
PWR
–
–
CORE_VDD
This pin provides power to the core circuitry of
the PD67XX. It can be connected to either a
3.3- or 5-volt power supply, independent of the
operating voltage of other interfaces. For power
conservation on a system with a 3.3-volt supply
available, this pin should be connected to the
3.3-volt supply even if there is no intention of
operating other interfaces on the device at less
than 5 volts.
16, 91
27, 133
2
PWR
–
–
GND
All ground pins should be connected to system
ground.
20, 54, 72, 78,
128, 133
31, 70, 79,
111, 140, 192
6
GND
–
–
Table 6. Pin Usage Summary
Pin Group
Pin Quantity
PD6710
PD6722
ISA bus interface pins
69
69
Socket interface pins
60
120
General-purpose strobe pins
0
2
Voltage sense pins
1
0
N/C
1
0
Power control pins
4
8
Power and ground pins
9
9
Total:
144
208