Rainbow Electronics DS2143Q User Manual

Features, Description, Pin assignment

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DS2143/DS2143Q

E1 Controller

DS2143/DS2143Q

031397 1/40

FEATURES

•

E1/ISDN–PRI framing transceiver

•

Frames to CAS, CCS, and CRC4 formats

•

Parallel Control Port

•

Onboard two frame elastic store slip buffer

•

Extracts and inserts CAS signaling bits

•

Programmable output clocks for fractional E1 links,
DS0 loopbacks, and Drop and Insert applications

•

Onboard Sa data link support circuitry

•

FEBE E–Bit Detection, Counting and Generation

•

Pin compatible with DS2141A T1 Controller

•

5V supply; low power (50 mW) CMOS

•

Available in 40–pin DIP and 44–pin PLCC (DS2143Q)

DESCRIPTION

The DS2143 is a comprehensive, software–driven E1
framer. It is meant to act as a slave or coprocessor to a
microcontroller or microprocessor. Quick access via
the parallel control port allows a single micro to handle
many E1 lines. The DS2143 is very flexible and can be
configured into numerous orientations via software.
The software orientation of the device allows the user to
modify their design to conform to future E1 specification
changes. The controller contains a set of 69 eight–bit
internal registers which the user can access. These
internal registers are used to configure the device and
obtain information from the E1 link. The device fully
meets al l of the latest E1 specifications including CCITT
G.704, G.706, and G.732.

PIN ASSIGNMENT

LI_SDI

LI_CS

RD (DS)

40–PIN DIP (600 MIL)

TCLK

TSER

TCHCLK

TPOS

TNEG

AD0

AD1

AD2

AD3

AD4

AD5

AD6

AD7

BTS

RD(DS)

ALE(AS)

WR(R/W)

RLINK

VSS

VDD

TSYNC

TLINK

TLCLK

INT1

INT2

RLOS/LOTC

TCHBLK

RCHBLK

LI_CS

LI_CLK

SYSCLK

RNEG

RPOS

RSYNC

RSER

RCHCLK

RCLK

RLCLK