DS2143 Datasheet, PDF (1/44 Pages) Dallas Semiconductor – E1/ISDN-PRI framing transceiver

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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)
DS2143/DS2143Q
E1 Controller
PIN ASSIGNMENT
TCLK 1
TSER ₂
TCHCLK 3
TPOS 4
TNEG 5
AD0 6
AD1 7
AD2 8
AD3 9
AD4 10
AD5 11
AD6 ¹²
AD7 ¹³
BTS 14
RD(DS) 15
CS 16
ALE(AS) 17
WR(R/W) ¹⁸
RLINK ¹⁹
VSS 20
40 VDD
39 TSYNC
38 TLINK
37 TLCLK
36 ^INT1
35 INT2
34 RLOS/LOTC
33 TCHBLK
32 RCHBLK
31 LI_CS
30 LI_CLK
29 _{LI_SDI}
28 SYSCLK
27 RNEG
26 RPOS
25 RSYNC
24 ^RSER
23 _RCHCLK
22 RCLK
21 RLCLK
40-Pin DIP (600-mil)
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
BTS
RD(DS)
NC
6 5 4 3 2 1 44 43 42 41 40
7
39
8
38
9
37
10
36
11
35
12
44-PIN PLCC
34
13
33
14
32
15
31
16
30
17
29
18 19 20 21 22 23 24 25 26 27 28
RLOS/LOTC
TCHBLK
RCHBLK
LI_CS
LI_CLK
LI_SDI
NC
NC
SYSCLK
RNEG
RPOS
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 8-bit internal registers which the user
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