IMP16C554 Datasheet, PDF (1/20 Pages) IMP, Inc – Quad Universal Asynchronous Receiver/Transmitter (UART) with FIFOs

IMP16C554
Data Communications
Quad Universal Asynchronous
Receiver/Transmitter (UART)
with FIFO's
Description
The IMP16C554 is a universal asynchronous receiver and
transmitter with 16 byte transmit and receive FIFO. A
programmable baud rate generator is provided to select
transmit and receive clock rates from 50Hz to 1.5MHz.
The IMP16C554 is an improved version of the IMP16C550
UART with higher operating speed and lower access time.
The IMP16C554 on board status registers provides the
error conditions, type and status of the transfer operation
being performed. Included is complete MODEM control
capability, and a processor interrupt system that may be
software tailored to the user’s requirements. The
IMP16C554 provides internal loop-back capability for on
board diagnostic testing.
The IMP16C554 is fabricated in an advanced 1.2u CMOS
process to achieve low drain power and high speed
requirements.
Pin Configuration
Key Features
16 byte receive FIFO with error flags
Modem control signal (CTS*, RTS*, DSR*, DTR*,
RI* ,CD*)
Programmable character lengths(5,6,7,8)
Even, odd, or no parity bit generation and detection
Status report register
Independent transmit and receive control
TLL compatible inputs. outputs
Software compatible with Ei8250, 1Ei16C550
460.8kHz transmit/receive operation with 7.372
MHz crystal or external clock source
DSRA• 10
CTSA• 11
DTRA• 12
VCC 13
RTSA• 14
INTA 15
CSA• 16
TXA 17
IOW• 18
TXB 19
CSB• 20
INTB 21
RTSB• 22
GND 23
DTRB 24
CTSD• 25
DSRB• 26
IMP 16C554
60 DSRD•
59 CTSD•
58 DTRD•
57 GND
56 RTSD•
55 INTD
54 CSD•
53 TXD
52 IOR•
51 TXC
50 CSC•
49 INTC
48 RTSC•
47 VCC
46 DTRC•
45 CTSC•
44 DSRC•
68-PIN PLCC
DSRA• 1
CTSA• 2
DTRA• 3
VCC 4
RTSA• 5
INTA 6
CSA• 7
TXA 8
IOW• 9
TXB 10
CSB• 11
INTB 12
RTSB• 13
GND 14
DTRB 15
CTSD• 16
IMP 16C554
48 DSRD•
47 CTSD•
46 DTRD•
45 GND
44 RTSD•
43 INTD
42 CSD•
41 TXD
40 IOR•
39 TXC
38 CSC•
37 INTC
36 RTSC•
35 VCC
34 DTRC•
33 CTSC•
64-PIN QFP
1
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© 2002 IMP, Inc.