Rainbow Electronics DS2141A User Manual

Features, Description, Pin assignment

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DS2141A

T1 Controller

DS2141A

021997 1/35

FEATURES

•

DS1/ISDN–PRI framing transceiver

•

Frames to D4, ESF, and SLC–96 formats

•

Parallel control port

•

Onboard, dual two–frame elastic store slip buffers

•

Extracts and inserts robbed–bit signaling

•

Programmable output clocks

•

Onboard FDL support circuitry

•

5V supply; low–power CMOS

•

Available in 40–pin DIP and 44–pin PLCC (DS2141Q)

•

Compatible with DS2186 Transmit Line Interface,
DS2187 Receive Line Interface, DS2188 Jitter Atten-
uator, DS2290 T1 Isolation Stik, and DS2291 T1 Long
Loop Stik.

DESCRIPTION

The DS2141A is a comprehensive, software–driven T1
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 T1 lines. The DS2141A 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 T1 specification
changes. The controller contains a set of 62 8–bit inter-
nal registers which the user can access. These internal
registers are used to configure the device and obtain in-
formation from the T1 link. The device fully meets all of
the latest T1 specifications including ANSI
T1.403–1989, AT&T TR 62411 (12–90), and CCITT
G.704 and G.706.

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