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SCN2653A, SCN26562, SCN26562C2N48

Table of contents:
Info of SCN2653A
Info of SCN26562
Info of SCN26562C2N48

SCN2653A, SCN26562, SCN26562C2N48 Selling Leads, Datasheet

MFG:PHIL Package Cooled:DIP-16 D/C:87+

SCN2653A, SCN26562, SCN26562C2N48 Picture

SCN2653A, SCN26562, SCN26562C2N48 Datasheet download

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Part Number: SCN2653A

MFG: PHIL

Package Cooled: DIP-16

D/C: 87+

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SCN26562 General Description

The Philips Semiconductors SCN26562 Dual Universal Serial Communications Controller (DUSCC) is a single-chip MOS-LSI communications device that provides two independent, multi-protocol, full-duplex receiver/transmitter channels in a single package. It supports bit-oriented and character-oriented (byte countand byte control) synchronous data link controls as well as asynchronous protocols. The SCN26562 interfaces to synchronous bus MPUs and is capable of program-polled, interrupt driven, block-move or DMA data transfers.

The operating mode and data format of each channel can be programmed independently. Each channel consists of a receiver, a transmitter, a 16-bit multi-function counter/timer, a digital phase-locked loop (DPLL), a parity/CRC generator and checker, and associated control circuits. The two channels share a common bit rate generator (BRG), operating directly from a crystal or an external clock, which provides 16 common bit rates simultaneously.

Theoperating rate for the receiver and transmitter of each channel can be independently selected from the BRG, the DPLL, the counter/timer, or from an external 1X or 16X clock, making the DUSCC well suited for dual-speed channel applications. Data rates up to 4Mbits per second are supported.

The transmitter and receiver each contain a four-deep FIFO with appended transmitter command and receiver status bits and a shift register. This permits reading and writing of up to four characters at a time, minimizing the potential of receiver overrun or transmitter underrun, and reducing interrupt or DMA overhead. In addition, a flow control capability is provided to disable a remote transmitter when the FIFO of the local receiving device is full.

Two modem control inputs (DCD and CTS) and three modem control outputs (RTS and two general purpose) are provided. Because the modem control inputs and outputs are general purpose in nature, they can be optionally programmed for other functions.

This document contains the electrical specifications for the SCN26562. See SCN26562/SCN68562 User!fls Guide for complet functional description.

SCN26562 Maximum Ratings

SYMBOL	PARAMETER	RATING	UNIT
T_A	Operating ambient temperature²	0 to +70
T_STG	Storage temperature	-65 to +150
V_CC	voltages from V_CC to GND³	-0.5 to +7.0	V
V_S	Voltage from any pin to ground³	-0.5 to V _CC+0.5	V

SCN26562 Features

Dual full-duplex synchronous/asynchronous receiver and transmitter
Multiprotocol operation
¤ BOP: HDLC/ADCCP, SDLC, SDLC loop, X.25 or X.75 link level,etc.
¤ COP: BISYNC, DDCMP
¤ ASYNC: 5-8 bits plus optional parit
Four character receiver and transmitter FIFOs
0 to 4Mbit/sec data rate
Programmable bit rate for each receiver and transmitter selectable from:
¤ 16 fixed rates: 50 to 38.4k baud
¤ One user-defined rate derived from programmable counter/timer
¤ External 1X or 16X clock
¤ Digital phase-locked loop
Parity and FCS (frame check sequence LRC or CRC) generation and checking
Programmable data encoding/decoding: NRZ, NRZI, FM0, FM1, Manchester
Programmable channel mode: full- and half-duplex, auto-echo, or local loopback
Programmable data transfer mode: polled, interrupt, DMA, wait
DMA interface
¤ Single- or dual-address dual transfers
¤ Half- or full-duplex operation
¤ Automatic frame termination on counter/timer terminal count or DMA EOPN input
Interrupt capabilities
¤ Vector output (fixed or modified by status)
¤ Programmable internal priorities
¤ Maskable interrupt conditions
Multi-function programmable 16-bit counter/timer
¤ Bit rate generator
¤ Event counter
¤ Count received or transmitted characters
¤ Delay generator
¤ Automatic bit length measurement
Modem controls
¤ RTS, CTS, DCD, and up to four general purpose pins per channel
¤ CTS and DCD programmable auto-enables for Tx and Rx
¤ Programmable interrupt on change of CTS or DCD
On-chip oscillator for crystal
TTL compatible
Single +5V power supply

SCN26562 Connection Diagram

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