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CDP1854 Datasheet(PDF) 1 Page - Intersil Corporation

Part No. CDP1854
Description  High Reliability CMOS Programmable Universal Asynchronous Receiver/Transmitter (UART)
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
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 1 page
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5-62
Features
• Two Operating Modes
- Mode 0 - Functionally Compatible with Industry
Types Such as the TR1602A and CDP6402
- Mode 1 - Interfaces Directly with CDP1800 Series
Microprocessors without Additional Components
• Full or Half-Duplex Operation
• Parity, Framing, and Overrun Error Detection
• Fully Programmable with Externally Selectable Word
Length (5-8 Bits), Parity Inhibit, Even/Odd Parity, and
1, 1-1/2, or 2 Stop Bits
Description
The CDP1854A/3 and CDP1854AC/3 are high reliability
silicon gate CMOS Universal Asynchronous Receiver/Trans-
mitter (UART) circuits. They are designed to provide the
necessary formatting and control for interfacing between
serial and parallel data. For example, these UARTs can be
used to interface between a peripheral or terminal with serial
I/O ports and the 8-bit CDP1800-series microprocessor
parallel data bus system. The CDP1854A/3 is capable of full
duplex operation, i.e., simultaneous conversion of serial
input data to parallel output data and parallel input data to
serial output data.
The CDP1854A/3 UART can be programmed to operate in
one of two modes by using the mode control input. When the
mode input is high (MODE = 1), the CDP1854A/3 is directly
compatible with the CDP1800 series microprocessor system
without additional interface circuitry. When the mode input is
low (MODE = 0), the device is functionally compatible with
industry standard UARTs such as the TR1602A and
CDP6402. It is also pin compatible with these types, except
that pin 2 is used for the mode control input.
The CDP1854A/3 and the CDP1854AC/3 are functionally
identical. The CDP1854A/3 has a recommended operating
voltage range of 4V to 10.5V, and the CDP1854AC/3 has a
recommended operating voltage range of 4V to 6.5V.
Ordering Information
PACK-
AGE
TEMP.
RANGE
5V/200K
BAUD
10V/400K
BAUD
PKG.
NO.
SBDIP
-55oC to +125oC CDP1854ACD3 CDP1854ACD3 D40.6
Pinouts
CDP1854A/3, CDP1854AC/3 (SBDIP) (MODE 0)
TOP VIEW
CDP1854A/3, CDP1854AC/3 (SBDIP) (MODE 1)
TOP VIEW
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
VDD
MODE (VSS)
VSS
RRD
R BUS 7
R BUS 6
R BUS 5
R BUS 4
R BUS 3
R BUS 2
R BUS 1
R BUS 0
PE
FE
OE
SFD
R CLOCK
DAR
DA
SDI
28
40
39
38
37
36
35
34
33
32
31
30
29
27
26
25
24
23
22
21
T CLOCK
EPE
WLS 1
WLS 2
SBS
PI
CRL
T BUS 7
T BUS 6
T BUS 5
T BUS 4
T BUS 3
T BUS 2
T BUS 1
T BUS 0
SD0
TSRE
THRL
THRE
MR
13
1
2
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
VDD
MODE (VDD)
VSS
CS2
R BUS 7
R BUS 6
R BUS 5
R BUS 4
R BUS 3
R BUS 2
R BUS 1
R BUS 0
INT
FE
PE/OE
RSEL
R CLOCK
TPB
DA
SDI
28
40
39
38
37
36
35
34
33
32
31
30
29
27
26
25
24
23
22
21
T CLOCK
CTS
ES
PS1
NC
CS3
RD/WR
T BUS 7
T BUS 6
T BUS 5
T BUS 4
T BUS 3
T BUS 2
T BUS 1
T BUS 0
SD0
RTS
CS1
THRE
CLEAR
NC = NO CONNECT
March 1997
CDP1854A/3,
CDP1854AC/3
High Reliability CMOS Programmable Universal
Asynchronous Receiver/Transmitter (UART)
File Number
1715.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207
| Copyright
© Intersil Corporation 1999




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