The IMP16C854 is a universal asynchronous receiver and transmitter (UART) and is
available in different packages. The IMP16C854 is an quad UART with enhanced features
like 128 byte deep transmit and receive fifo’s, programmable transmit and receive trigger
levels to enable data rates of 2Mbps with low system interface overhead and in band/out
of band flow controls. Status registers provide the user with error indications and opera-
tional status, modem interface control status. Interrupt levels are software programmable
to suit different system requirements. Internal loopback capability facilitates diagnostics.
Low power modes of IMP16C854 enables its use in critical low power applications.
The IMP16C854 is available in industry standard 64 pin TQFP, 68 pin PLCC and 100 pin
QFP packages. Each additional pin on the package makes available additional range of
features for the application.
•
Compatibility with the Industry Standard ST16C454, ST68C454, ST68C554,
TL16C554, ST16C654, ST68C654, TL16C554FN and TL16C754FN.
•
Data Rates upto 2Mbps.
•
128 byte transmit FIFO and receive fifo.
•
Programmable FIFO interrupt Generation.
• CTS/RTS flow control with Hysteresis.
• Xon/Xoff flow control.
• Selectable clock frequency pre-scaler and programmable baud rate generator.
• IrDA v1.0 encoder/decoder interface along with standard wired modem interface.
• Low power mode.
• 3.3V operation.
1
Description
Key Features
IMP16C854
IMP16C854
Data Communications
Quad Universal Asynchronous
Receiver/Transmitter (UART)
FIFO Counter & 128-BYTE FIFO
www.ds-imp.com.cn Daily Silver IMP
26
28
32
17
18
19
20
31
29
30
27
21
22
23
24
25
DSRB
39
37
33
48
47
46
45
34
36
35
38
44
43
42
41
40
10
12
16
1
2
3
4
15
13
14
11
5
6
7
8
9
IMP16C854
TQFP64
DSRC
64
63
62
49
50
51
52
53
54
55
56
57
58
59
60
61
DSRA
CTSA
DTRA
VCC
RTSA
CSA
TXA
IOW
TXB
CSB
INTB
RTSB
GND
DTRB
CTSB
INTA
CDB
RIB
RXB
CLKSEL
A2
A1
A0
XTAL1
XTAL2
RESET
GND
RXC
RIC
CDC
DSRD
CTSD
DTRD
GND
RTSD
CSD
TXD
IOR
TXC
CSC
INTC
RTSC
VCC
DTRC
CTSC
INTD
CDA
RIA
RXA
GND
D7
D6
D5
D4
D3
D2
D1
D0
VCC
RXD
RID
CDD
64-pin TQFP Package Signals
2
Pin
Description
Data Communications
IMP16C854
IMP16C
854
www.ds-imp.com.cn Daily Silver IMP