DS2143 データシートの表示（PDF） - Dallas Semiconductor -> Maxim Integrated

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DS2143

E1 Controller

Dallas Semiconductor -> Maxim Integrated 

SYNC/RESYNC CRITERIA Table 2

FRAME OR

MULTIFRAME

SYNC CRITERIA

LEVEL

FAS

FAS present in frames N and N

+ 2, and FAS not present in

frame N + 1.

CRC4

CAS

Two valid MF alignment words

found within 8 ms.

Valid MF alignment word

found and previous time slot 16

contains code other than all 0s.

DS2143/DS2143Q

RESYNC CRITERIA

Three consecutive incorrect FAS

received.

Alternate (RCR1.2=1) the above

criteria is met or three consecutive

incorrect bit 2 of non-FAS received.

915 or more CRC4 code words out

of 1000 received in error.

Two consecutive MF alignment

words received in error.

ITU

SPEC.

G.706

4.1.1

4.1.2

G.706

4.2

4.3.2

G.732

5.2

RCR2: RECEIVE CONTROL REGISTER 2 (Address=11 Hex)

(MSB)

Sa8S

Sa7S

Sa6S

Sa5S

Sa4S SCLKM

ESE

(LSB)

-

SYMBOL

Sa8S

Sa7S

Sa6S

Sa5S

Sa4S

SCLKM

ESE

-

POSITION NAME AND DESCRIPTION

RCR2.7

Sa8 Bit Select. Set to 1 to report the Sa8 bit at the RLINK pin;

set to 0 to not report the Sa8 bit.

RCR2.6

Sa7 Bit Select. Set to 1 to report the Sa7 bit at the RLINK pin;

set to 0 to not report the Sa7 bit.

RCR2.5

Sa6 Bit Select. Set to 1 to report the Sa6 bit at the RLINK pin;

set to 0 to not report the Sa6 bit.

RCR2.4

Sa5 Bit Select. Set to 1 to report the Sa5 bit at the RLINK pin;

set to 0 to not report the Sa5 bit.

RCR2.3

Sa4 Bit Select. Set to 1 to report the Sa4 bit at the RLINK pin;

set to 0 to not report the Sa4 bit.

RCR2.2

SYSCLK Mode Select.

0 = if SYSCLK is 1.544 MHz.

1 = if SYSCLK is 2.048 MHz.

RCR2.1

Elastic Store Enable.

0 = elastic store is bypassed.

1 = elastic store is enabled.

RCR2.0 Not Assigned. Should be set to 0 when written to.

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