PC87393VJG National Semiconductor, PC87393VJG Datasheet - Page 21

• Manufacturer Part Number: PC87393VJG
• Description: IC, SUPER I/O DEVICE, TQFP-100
• Manufacturer: National Semiconductor

Specifications of PC87393VJG

• Data Rate: 2Mbps
• Supply Voltage Range: 3V to 3.6V
• Logic Case Style: TQFP
• No. Of Pins: 100
• Operating Temperature Range: 0°C to +70°C
• Termination Type: SMD
• Transceiver Type: Interface
• Rohs Compliant: No

1.0 Signal/Pin Connection and Description
1.5.8
1.5.9
ACK
AFD_DSTRB 53
BUSY_WAIT 40
ERR
INIT
PD7-3,
PD2, PD1
PD0
PE
SLCT
SLIN_ASTRB 47
STB_WRITE 54
PNF
V
V
DD
SS
Signal
Signal
Parallel Port
Power and Ground
14, 39,
63, 88
13, 38,
64, 89
41
51
49
42-46,
48, 50,
52
37
36
Pin/s
Pin/s
35
I/O Buffer Type Power Well
I
I
I/O Buffer Type Power Well
I/O
O
O
O
O
I
I
I
I
I
I
OD
OD
OD
OD
PWR
GND
14
14
14
14
O
IN
IN
IN
IN
IN
IN
IN
14/14
, O
, O
, O
, O
T
T
T
T
T
T
T
14/14
14/14
14/14
14/14
-
-
V
V
V
V
V
V
V
V
V
V
V
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
DD
Main 3.3V Power Supply
Ground
Acknowledge. Pulsed low by the printer to indicate that it has
received data from the Parallel Port.
AFD - Automatic Feed. When low, instructs the printer to
automatically feed a line after printing each line. This pin is in
TRI-STATE after a 0 is loaded into the corresponding control
register bit. An external 4.7 K
attached to this pin.
DSTRB - Data Strobe (EPP). Active low, used in EPP mode
to denote a data cycle. When the cycle is aborted, DSTRB
becomes inactive (high).
Busy. Set high by the printer when it cannot accept another
character.
Wait. In EPP mode, the Parallel Port device uses this active
low signal to extend its access cycle.
Error. Set active low by the printer when it detects an error.
Initialize. When low, initializes the printer. This signal is in
TRI-STATE after a 1 is loaded into the corresponding control
register bit. Use an external 4.7 K
Parallel Port Data. Transfer data to and from the peripheral
data bus and the appropriate Parallel Port data register. These
signals have a high current drive capability.
Paper End. Set high by the printer when it is out of paper. This
pin has an internal weak pull-up or pull-down resistor.
Select. Set active high by the printer when the printer is
selected.
SLIN - Select Input. When low, selects the printer. This signal
is in TRI-STATE after a 0 is loaded into the corresponding
control register bit. Uses an external 4.7 K
ASTRB - Address Strobe (EPP). Active low, used in EPP
mode to denote an address or data cycle. When the cycle is
aborted, ASTRB becomes inactive (high).
STB - Data Strobe. When low, Indicates to the printer that
valid data is available at the printer port. This signal is in TRI-
STATE after a 0 is loaded into the corresponding control
register bit. An external 4.7 K
employed.
WRITE - Write Strobe. Active low, used in EPP mode to
denote an address or data cycle. When the cycle is aborted,
WRITE becomes inactive (high).
Printer Not Floppy. This signal selects the internal logical
device that is connected to the PPM pins. For details on
setting PNF polarity, see Section 2.10.6.
21
(Continued)
Description
Description
pull-up resistor should be
pull-up resistor should be
pull-up resistor.
pull-up resistor.
www.national.com