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SCN2661BA1F28 Datasheet

  • SCN2661BA1F28

  • Enhanced programmable communications interface EPCI

  • 19頁

  • PHILIPS

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Philips Semiconductors
Product specification
Enhanced programmable communications
interface (EPCI)
SCN2661/SCN68661
DESCRIPTION
The Philips Semiconductors SCN2661 EPCI is a universal
synchronous/asynchronous data communications controller chip
that is an enhanced version of the SCN2651. It interfaces easily to
all 8-bit and 16-bit microprocessors and may be used in a polled or
interrupt driven system environment. The SCN2661 accepts
programmed instructions from the microprocessor while supporting
many serial data communications disciplines 鈥攕ynchronous and
asynchronous 鈥?in the full- or half-duplex mode. Special support
for BISYNC is provided.
The EPCI serializes parallel data characters received from the
microprocessor for transmission. Simultaneously, it can receive
serial data and convert it into parallel data characters for input to the
microcomputer.
The SCN2661 contains a baud rate generator which can be
programmed to either accept an external clock or to generate
internal transmit or receive clocks. Sixteen different baud rates can
be selected under program control when operating in the internal
clock mode. Each version of the EPCI (A, B, C) has a different set
of baud rates.
PIN CONFIGURATIONS
D2
D3
RxD
GND
D4
D5
D6
D7
1
2
3
4
5
6
7
8
DIP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
D1
D0
V
CC
RxC/BKDET
DTR
RTS
DSR
RESET
BRCLK
TxD
TxEMT/DSCHG
CTS
DCD
TxRDY
TxC/XSYNC 9
A1 10
CE 11
A0 12
R/W 13
RxRDY 14
FEATURES
鈥?/div>
Synchronous operation
鈥?/div>
5- to 8-bit characters plus parity
鈥?/div>
Single or double SYN operation
鈥?/div>
Internal or external character synchronization
鈥?/div>
Transparent or non-transparent mode
鈥?/div>
Transparent mode DLE stuffing (Tx) and detection (Rx)
鈥?/div>
Automatic SYN or DLE-SYN insertion SYN, DLE and DLESYN
stripping
鈥?/div>
Odd, even, or no parity
鈥?/div>
Local or remote maintenance loopback mode
鈥?/div>
Baud rate: DC to 1Mbps (1X clock)
INDEX
CORNER
4
1
26
5
PLCC
25
11
12
TOP VIEW
NOTE:
Pin Functions the same as 28-pin DIP.
18
19
鈥?/div>
Asynchronous operation
鈥?/div>
5- to 8-bit characters plus parity
鈥?/div>
1, 1-1/2 or 2 stop bits transmitted
鈥?/div>
Odd, even, or no parity
鈥?/div>
Parity, overrun and framing error detection
鈥?/div>
Line break detection and generation
鈥?/div>
False start bit detection
鈥?/div>
Automatic serial echo mode (echoplex)
鈥?/div>
Local or remote maintenance loopback mode
鈥?/div>
Baud rate: DC to 1Mbps
(1X clock)
DC to 62.5kbps (16X clock)
DC to 15.625kbps
(64X clock)
SD00077
鈥?/div>
Dynamic character length switching
鈥?/div>
Full- or half-duplex operation
鈥?/div>
TTL compatible inputs and outputs
鈥?/div>
RxC and TxC pins are short-circuit protected
鈥?/div>
Single +5V power supply
鈥?/div>
No system clock required
APPLICATIONS
OTHER FEATURES
鈥?/div>
Internal or external baud rate clock
鈥?/div>
3 baud rate sets
鈥?/div>
16 internal rates for each set
鈥?/div>
Double-buffered transmitter and receiver
1994 Apr 27
1
鈥?/div>
Intelligent terminals
鈥?/div>
Network processors
鈥?/div>
Front-end processors
鈥?/div>
Remote data concentrators
鈥?/div>
Computer-to-computer links
鈥?/div>
Serial peripherals
鈥?/div>
BISYNC adaptors
853-1070 12793

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