CL-PD6710/’22
ISA–to–PC-Card Host Adapters
2.2 Pin Description Conventions
The following conventions apply to the pin description tables in Section 2.3:
● A dash (-) at the beginning of a pin name indicates an active-low signal for the PC Card bus.
● An asterisk (*) at the end of a pin name indicates an active-low signal for the ISA bus or that is a general
interface for the CL-PD67XX.
● Pins marked with a dagger (†) in the pin description tables can be switched between CMOS and TTL input
levels when CORE_VDD is powered at 5 volts. All other pins use CMOS input levels when CORE_VDD is
powered at 5 volts and TTL input levels when powered at 3.3 volts.
● A pin name ending in bracketed digits separated by a colon [n:n] indicates a multi-pin bus.
● The pin number (Pin Number) column indicates the package pin that carries the listed signal. Note that multi-
pin buses are listed with the first pin number corresponding to the most-significant bit of the bus. For example,
pin numbers 123:120, 118, 117, 115, 114, 112, 110, 108:106, 104, 103, 101, and 100 are associated with
ISA Bus Address Input and Data Input/Output pins SA[16:0] and indicate that:
— SA16 is pin 123
— SA15 is pin 122
— SA0 is pin 100
● The quantity (Qty.) column indicates the number of pins used (per socket where applicable).
● The I/O-type code (I/O) column indicates the input and output configurations of the pins on the
CL-PD67XX.The possible types are defined below.
● The power-type code (Pwr.) column indicates the output drive power source for an output pin or the pull-up
power source for an input pin on the CL-PD67XX. The possible types are defined below.
I/O Type
Description
Power Type Output or Pull-up Power Source
I
Input pin
+5V: powered from a 5.0-volt power
supply in most systems (see descrip-
tion of +5V pin in Table 2-5)
1
2
O
Constant-driven output pin
Input/output pin
I/O
A_SOCKET_VCC: powered from the
Socket A V supply connecting to PC
CC
O-OD
O-TS
Open-drain output pin
Tristate output pin
Card pins 17 and 51 of Socket A
B_SOCKET_VCC: powered from the
3
4
Socket B V supply connecting to PC
Card pins 17 and 51 of Socket B
CC
An internal pull-up resistor is
present
-PU
ISA_VCC: powered from the ISA bus
power supply
GND
PWR
Ground pin
Power pin
CORE_VDD:usually powered from the
lowest available power supply for low-
est power consumption, which in most
systems is 3.3 volts
5
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 Chapter 15
for more information). Note that the drive type listed for an input-only (I) pin is not applicable (–).
May 1997
11
PRELIMINARY DATA SHEET v3.1
PIN INFORMATION
CIRRUS [ CIRRUS LOGIC ]
