XRT84L38 データシートの表示（PDF） - Exar Corporation

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XRT84L38

OCTAL T1/E1/J1 FRAMER

Exar Corporation 

REV. 1.0.1

TRANSMIT SERIAL DATA INPUT

(Framer Channel Number indicated by _n)

XRT84L38

OCTAL T1/E1/J1 FRAMER

SIGNAL NAME

PIN #

TYPE

DESCRIPTION

TxInClk_0

TxInClk_1

TxInClk_2

TxInClk_3

TxInClk_4

TxInClk_5

TxInClk_6

TxInClk_7

TxTSb0_0

TxTSb0_1

TxTSb0_2

TxTSb0_3

TxTSb0_4

TxTSb0_5

TxTSb0_6

TxTSb0_7

C6

B13

A22

F26

AC26

AF21

AF10

AE6

C8

D15

A23

G24

AB24

AF20

AC13

AC7

I Transmit Input Clock Signal -- Transmit Framer _n (continued)

Transmit Back-plane Interface-H.100, 16.384 MHz Clock Mode

If TxMUXEN = 1 and TxIMODE[1:0] = 11 in Transmit interface control register,

Transmit back-plane interface of Framer_n is taking multiplexed data at a rate

of 16.384 Mbit/s. TxInClk_0 and TxInClk_4 signals will be Input clock signals

running at 16.384 MHz. TxInClk_1, 2, 3 and TxInClk_5, 6, 7 signals are not

required. Transmit Payload data of Channel 0, 1, 2 and 3 are multiplexed and

latched into Transmit back-plane interface using clock edge of TxInClk_0 via

TxSer_0 input pin. Transmit Payload data of Channel 4, 5, 6 and 7 are multi-

plexed and latched into Transmit back-plane interface using clock edge of

TxInClk_4 via TxSer_4 input pin. Inside the Octal Framer, data will be de-multi-

plexed into 8 channels from the serial inputs of Channel 0 and 4.

O Transmit Framer_n--Time Slot Octet Identifier Output-Bit [0:4]:

These output signals (TxTSb4_n through TxTSb0_n) reflects the five-bit binary

value of the number of Time Slot (in the incoming DS1 frame), being accepted

and processed by the Transmit Payload Data Input Interface block associated

with Framer_n.

Terminal Equipment should use the TxTSClk_n clock signal to sample the five

output pins of each channel in order to identify the time-slot being processed

by the Transmit Payload Data Input Interface block of Framer_n.

TxSig_0

TxSig_1

TxSig_2

TxSig_3

TxSig_4

TxSig_5

TxSig_6

TxSig_7

TxTSb1_0

TxTSb1_1

TxTSb1_2

TxTSb1_3

TxTSb1_4

TxTSb1_5

TxTSb1_6

TxTSb1_7

C8

D15

A23

G24

AB24

AF20

AC13

AC7

D9

B15

C22

H23

AC24

AF19

AF12

AD6

I Transmit Serial Signaling Input--Transmit Framer_n

These pins can be used to input robbed-bit signaling data within an outbound

DS1 frame or to input Channel Associated Signaling (CAS) bits within an out-

bound E1 frame, if Framer_n is configured accordingly.

O Transmit Framer_n--Time Slot Octet Identifier Output-Bit 1:

These output signals (TxTSb4_n through TxTSb0_n) reflects the five-bit binary

value of the number of Time Slot (in the incoming DS1 frame), being accepted

and processed by the Transmit Payload Data Input Interface block associated

with Framer_n.

Terminal Equipment should use the TxTSClk_n clock signal to sample the five

output pins of each channel in order to identify the time-slot being processed

by the Transmit Payload Data Input Interface block of Framer_n.

TxFrTD_0

TxFrTD_1

TxFrTD_2

TxFrTD_3

TxFrTD_4

TxFrTD_5

TxFrTD_6

TxFrTD_7

D9

B15

C22

H23

AC24

AF19

AF12

AD6

I Transmit Serial Fractional T1/E1 Input--Transmit Framer_n

These pins can be used to input fractional DS1/E1 payload data within an out-

bound DS1/E1 frame, if Framer_n is configured accordingly. In this mode, ter-

minal equipment will use either TxTSClk_n or TxSerClk_n output pins to clock

out fractional DS1/E1 payload data. Framer_n will then use TxTSClk_n or

TxSerClk_n to clock in fractional DS1/E1 payload data. Please see pin

description of TxTSClk_n for details.

11

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