IMP16C552-CJ68 IMP Inc, IMP16C552-CJ68 Datasheet - Page 7

• Manufacturer Part Number: IMP16C552-CJ68
• Description: Dual Universal Asynchronous Receiver/Transmitter (UART) with 16-BYTE FIFO & Parallel Printer Port
• Manufacturer: IMP Inc

7
LPTOE*
Mnemonic
INT0.INT1
SOUT0
SOUT1
D0-D7
PD7-PD0
STB*+
AFD*+
INIT*+
SLIN*+
INT2
ERROR*
SLCT
BUSY
PE
ACK
1
Pin
type
OUT
OUT
1/0
1/0
1/0
1/0
1/0
1/0
0
1
1
1
1
1
1
Pin#
45.50
26.10
14-21
46-53
55
56
57
58
59
63
65
66
67
68
description
Serial channel interrupts Tri-state @ output (enable by bits of MCR of
each serial channel )goes high whenever an interrupt is pending for the
associated serial channel These pins are tri-stated whenever associated
channel is in loopback mode. These pins are reset during a Master
Reset.
Serial Output pins: Composite serial data output to the communications
link (peripheral MODEM or data set )the SOUTO S0 SOUT1 signal is
set to the marking(logic 1)state upon a Master Reset operation
Data
communications between the UART and the CPU Data control words
and status information are transferred via the D0-D7 Data bus
Parallel Port Data Bus: Bi-directional data port which provides parallel
input and output to the system. The eight lines are hold in a
high-impedance state when LPTOE is high
Line printer Strobe: Output line when active (low) provides the line
printer with a signal to latch the data currently on the parallel port data
bus
Line printer Auto Teed: Output line when active (low) provides signal for
the line printer to auto feed continuous form paper
Line Printer Initiallze : Output line to printer when active (low) signal
the line printer to begin an initialization routine
Line printer Select :Output line when active (low)selects the printer
Parallel Port Interrupt :Tri-State® output (enable by bit 4 of the Printer
Control Register ) goes active on the positive transition of ACK*. This
interrupt is reset low upon a reset operation or after pending interrupts
are serviced
Line Printer Error :Input line from the line printer informs the parallel port
of an error by inputting an active low signal Set low by the printer upon a
deselect condition PE or other error condition
Line Printer Select :input from the line printer that goes high when the
line printer has been selected
Line Printer Busy :input from the line printer that goes high when the line
printer has an operation in progress
Paper Empty :input form the line printer goes high when the printer is
out of paper
Printer Acknowledge :input form line printer that goes low to confirm the
data transfer from the MS16C552 to the printer was successful. This
input control INT2 pin directly.
Line Printer Output Enable: When low this input signal enables the
parallel port data bus as output. When high the parallel port data bus
pins are hold in a high impedance state. For normal line printer
operation, this line may be permanently grounded.
408-432-9100/www.impweb.com
Bus
D0—D7:
Tri-State®
IMP16C552
IMP16C552
bus
provides
bi-directional
© 2002 IMP, Inc.