pc87317vul National Semiconductor Corporation, pc87317vul Datasheet - Page 234

• Manufacturer Part Number: pc87317vul
• Description: Pc87317vul/pc97317vul Superi/o Plug And Play Compatible With Acpi Compliant Controller/extender
• Manufacturer: National Semiconductor Corporation

www.national.com
14.2.2 Group 2
Pin List:
Output from SLCT, PE and BUSY is open-drain in all SPP modes, except in SPP Compatible mode when the setup mode
is ECP-based FIFO and bit 4 of the Control2 parallel port register is 1. (See TABLE 6-1 "Parallel Port Mode Selection" on
page 138.) Otherwise, output from these signals is level 2. External 4.7 K pull-up resistors should be used.
PE is in Group 2 only if bit 2 of PP Confg0 Register is “0” (see Section 6.5.19 "PP Confg0 Register" on page 153).
All group 2 pins are back-drive protected.
14.2.3 Group 3
Pin List:
Output from ACK, ERR and PE is open-drain in all SPP modes, except in SPP Compatible mode when the setup mode is
ECP-based FIFO and bit 4 of the Control2 parallel port register is 1. (See TABLE 6-1 "Parallel Port Mode Selection" on page
138.) Otherwise, output from these signals is level 2.
External 4.7 K pull-up resistors should be used.
PE is in Group 3 only if bit 2 of PP Confg0 Register is “1” (see Section 6.5.19 "PP Confg0 Register" on page 153).
All group 3 pins are back-drive protected.
BUSY, PE, SLCT, WAIT
ACK, ERR, PE
Symbol
Symbol
V
V
V
V
1. Not tested. Guaranteed by design.
1. Not tested. Guaranteed by design.
I
I
IL
IL
IH
IH
IL
IL
Input High Voltage
Input Low Voltage
Input Leakage Current
Input High Voltage
Input Low Voltage
Input Leakage Current
Parameter
Parameter
TABLE 14-6. DC Characteristics of Group 2 Pins
TABLE 14-7. DC Characteristics of Group 3 Pins
Device Specifications
234
Conditions
Conditions
V
V
V
V
IN
IN
IN
IN
= V
= V
= V
= V
DD
DD
SS
SS
Min
0.5
Min
0.5
2.0
2.0
1
1
V
V
Max
Max
120
0.8
0.8
DD
DD
10
120
10
1
1
Unit
Unit
V
V
V
V
A
A
A
A