Ei16C450
UART
Semiconductor, Inc.
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•
Complete status reporting capabilities
FEATURES
Tri-State® TTL drive capabilities for bi-direc
tional data bus and control bus
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5V Operation
Full duplex asynchronous receiver and
transmitter
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Line break generation and detection
Internal diagnostic capabilities:
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Easily interfaces to most popular
microprocessors
- Loopback controls for communications link fault
isolation
Adds or deletes standard asynchronous com-
munication bits (start, stop, and parity ) to or
from a serial data stream
- Break, parity overrun, and framing error simulation
Fully prioritized interrupt systems controls
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Independently controlled transmitter, receiver,
line status, and data set interrupts
DESCRIPTION
Programmable baud rate generator allows
division of any input clock by 1 to (216-1) and
generates the internal 16 x clock
The Epic Ei16C450 Universal Asynchronous Receiver
Transmitter (UART) is a CMOS-VLSI communication
device in a single package.
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Independent receiver clock input
The UART performs serial to parallel conversion
on data characters received from a peripheral
MODEM control functions (CTS, RTS, DSR,
DTR, RI, and DCD)
device or
a
MODEM, and parallel-to-serial
conversions on data characters received from the
CPU. The CPU can read the complete status of the
UART at any time during the functional operation.
Status information reported includes the type and con-
dition of the transfer operation being performed by the
UART, as well as any error conditions (parity, overrun,
framing, or break detect).
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Fully programmable serial interface characteris
tics:
- 5, 6, 7, or 8 bit characters
- Even, odd, or no-parity bit generation and
detection
- 1, 1.5, or 2 stop bit generation
- Baud generation (DC to 56k baud)
Part Numbers May Be Marked With "IMP" or "Ei."
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False start bit detection
PIN CONFIGURATION
D0
D1
D2
D3
D4
D5
D6
D7
RCLK
SIN
1
2
3
4
5
6
7
8
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
VCC
RI•
DCD•
DSR•
CTS•
MR
OUT1•
DTR•
RTS•
OUT2•
INTRPT
NC
A0
A1
A2
ADS•
CSOUT
DDIS
DISTR
DISTR•
N.C.
D5
1
2
3
4
5
6
7
8
9
36 N.C.
35 RESET
D6
34 OP1
•
39 MR
D5
D6
D7
RCLK 10
SIN 11
7
8
9
38 OUT1•
37 DTR•
36 RTS•
35 OUT2•
34 NC
D7
33 DTR
•
E
i
RCLK
N.C.
RX
32 RTS
•
9
31 OP2
•
1
6
C
4
5
0
Ei16C450
Ei16C450
10
11
12
13
14
15
16
17
18
19
20
NC 12
30 INT
29 N.C.
28 A0
27 A1
26 A2
25 N.C.
SOUT
CS0
CS1
33 INTRPT
32 NC
SOUT 13
CS0 14
TX
31 A0
CS1 15
CS0
30 A1
CS2• 16
CS2•
BAUDOUT•
XTAL1
XTAL2
DOSTR•
DOSTR
VSS
CS1 10
29 A2
BAUDOUT• 17
CS2
11
12
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BAUDOUT
40-PIN DIP
44-PIN PLCC
48-PIN TQFP
5
For additional information, contact IMP, Inc. at 408.432.9100 or visit www.impweb.com
IMP, Inc. acquired Epic products on January 26, 2001. (see press release at http://www.impweb.com/PRESS/PR012601.htm)
IMP [ IMP, INC ]