PD6710/
’
22
—
ISA-to-PC-Card (PCMCIA) Controllers
16
Datasheet
Note:
All pin inputs are referenced to CORE_VDD, independent of their output supply voltage.
The drive-type (Drive) column describes the output drive-type of the pin (see DC specifications in
“
Electrical Specifications
”
on page 101
for more information). Note that the drive type listed for an
input-only (I) pin is not applicable (
–
).
3.3
Pin Descriptions
3
B_SOCKET_VCC: powered from the Socket
B V
supply connecting to PC Card pins 17
and 51 of Socket B
4
ISA_VCC: powered from the ISA bus power
supply
5
CORE_VDD: usually powered from the
lowest available power supply for lowest
power consumption, which in most systems
is 3.3 volts
Power Type
Output or Pull-up Power Source
Table 1. ISA Bus Interface Pins
(Sheet 1 of 4)
Pin Name
Description
Pin Number
Qty.
I/O
Pwr.
Drive
PD6710
PD6722
LA[23:17]
ISA Bus Address Input
: Connect to ISA
signals LA[23:17] or, for systems limited to
1-Mbyte address space, tie ALE high,
ground LA[23:20] and connect LA[19:17] to
ISA signals SA[19:17].
96, 94, 92, 89,
87, 85, 84
157, 155, 153,
151, 149, 147,
146
7
I
4
–
SA[16:0]
ISA Bus Address Input
: Connect to ISA
signals SA[16:0].
123:120, 118,
117, 115, 114,
112, 110,
108:106, 104,
103, 101, 100
184:181, 179,
178, 176, 175,
173, 171,
169:167, 165,
164, 162, 161
17
I
4
–
SD[15:0]
ISA Bus Data Input/Output
: These pins are
used to transfer data during a memory or I/O
cycle. Connect to ISA signals SD[15:0].
For 8-bit system buses, leave SD[15:8]
unconnected.
71, 73
–
75, 77,
79
–
81, 140,
139, 137, 136,
134, 132, 130,
129
134
–
137, 139,
141
–
143, 200,
199, 197, 196,
194, 193, 190,
189
16
I/O
4
12 mA
SBHE*
Byte High Enable
: This input is used in
conjunction with SA[0] to specify the width
and alignment of a data transfer. Connect to
ISA signal SBHE*.
For 8-bit system buses, pull up connect to
ISA_VCC supply.
98
159
1
I
4
–
IOR*
I/O Read
: This input indicates that a host
I/O read cycle is occurring. Connect to ISA
signal IOR*.
124
185
1
I
4
–
IOW*
I/O Write
: This input indicates that a host I/O
write cycle is occurring. Connect to ISA
signal IOW*.
125
186
1
I
4
–