Epic EI16C450 Datasheet

5

Semiconductor, Inc.

FEATURES

• 5V Operation

• Full duplex asynchronous receiver and
transmitter

• Easily interfaces to most popular
microprocessors

• Adds or deletes standard asynchronous com­munication bits (start, stop, and parity ) to or
from a serial data stream

• Independently controlled transmitter, receiver,
line status, and data set interrupts

• Programmable baud rate generator allows
division of any input clock by 1 to (2

16

-1) and

generates the internal 16 x clock

• Independent receiver clock input

• MODEM control functions (CTS, RTS, DSR,
DTR, RI, and DCD)

• 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)

• False start bit detection

PIN CONFIGURATION

• Complete status reporting capabilities

• Tri-State® TTL drive capabilities for bi-direc
tional data bus and control bus

• Line break generation and detection

• Internal diagnostic capabilities:

- Loopback controls for communications link fault

isolation

- Break, parity overrun, and framing error simulation

• Fully prioritized interrupt systems controls

DESCRIPTION

The Epic Ei16C450 Universal Asynchronous Receiver
Transmitter (UART) is a CMOS-VLSI communication
device in a single package.

The UART performs serial to parallel conversion
on data characters received from a peripheral
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 con­dition of the transfer operation being performed by the
UART, as well as any error conditions (parity, overrun,
framing, or break detect).

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21

E

i
1
6
C
4
5
0

D0
D1
D2
D3
D4
D5
D6
D7

RCLK

SIN

SOUT

CS0
CS1

CS2•

BAUDOUT•

XTAL1
XTAL2

DOSTR•

DOSTR

VSS

VCC
RI•
DCD•
DSR•
CTS•
MR
OUT1•
DTR•
RTS•
OUT2•
INTRPT
NC
A0
A1
A2
ADS•
CSOUT
DDIS
DISTR
DISTR•

39
38
37
36
35
34
33
32
31
30
29

7
8
9
10
11
12
13
14
15
16
17

D5
D6
D7

RCLK

SIN

NC

SOUT

CS0
CS1

CS2•

BAUDOUT•

MR
OUT1•
DTR•
RTS•
OUT2•
NC
INTRPT
NC
A0
A1
A2

XTAL1

XTAL2

DOSTR•

DOSTR

VSS

NC

DISTR•

DISTR

DDIS

CSOUT

ADS•

D4D3D2D1D0NCVCC

RI•

DCD•

CDSR•

CTS•

1819202122232425262728

65432

1

4443424140

Ei16C450

Ei16C450

UART

40-PIN DIP

44-PIN PLCC

36 N.C.
35 RESET
34 OP1

•

33 DTR

•

32 RTS

•

31 OP2

•

30 INT
29 N.C.
28 A0
27 A1
26 A2
25 N.C.

N.C. 1

D5 2
D6 3
D7 4

RCLK 5

N.C. 6

RX 7

TX 8
CS0 9
CS1 10

CS2

•

11

BAUDOUT

•

12

48 N.C.

47 D4

46 D3

45 D2

44 D1

43 D0

42 VCC

41 RI

40 DCD

•

39 DSR •38 CTS •37 N.C.

N.C. 13

XTAL1 14

XTAL2 15

IOW

•

16

IOW

•

17

GND 18

IOR

•

19

IOR 20

N.C. 21

DDIS

•

22

CSOUT 23

AS

•

24

48-PIN TQFP

Ei16C450

Part Numbers May Be Marked With "IMP" or "Ei."

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)