DS2181A datasheet(8/32 Pages) DALLAS

Part #	DS2181A

Description	CEPT Primary Rate Transceiver

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Manufacturer	DALLAS [Dallas Semiconductor]

Direct Link	https://www.maximintegrated.com/en.html

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DS2181A

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SERIAL PORT READ/WRITE Figure 3

NOTES:

1. SDI sampled on rising edge of SCLK.

2. SDO updated on falling edge of SCLK.

TCR: TRANSMIT CONTROL REGISTER Figure 4

(MSB)

(LSB)

TUA1

TSS

TSM

INBS

NBS

XBS

TSA1

ODM

SYMBOL

POSITION

NAME AND DESCRIPTION

TUA1

TCR.7

Transmit Unframed All 1’s.

0 = Normal operation.

1 = Replace outgoing data at TPOS and TNEG with unframed all

1’s code.

TSS

TCR.6

Transmit Signaling Select

1

0 = Signaling data embedded in the serial bit stream is sampled at

TSER during timeslot 16.

1 = Signaling data is channel associated and sampled at TSD as

shown in Table 6.

TSM

TCR.5

Transmit Signaling Mode

1

0 = Channel Associated Signaling (CAS).

1 = Common Channel Signaling (CCS).

INBS

TCR.4

International Bit Select

0 = Sample international bit at TIND.

1 = Outgoing international bit = TINR.7.

NBS

TCR.3

National Bit Select

0 = Sample national bits at TIND.

1 = Source outgoing national bits from TINR.4 through TINR.0.

XBS

TCR.2

Extra Bit Select

0 = Sample extra bits at TXD.

1 = Source extra bits from TXR.0 through TXR.1 and TXR.3.

TSA1

TCR.1

Transmit Signaling All 1’s

0 = Normal operation.

1 = Force contents of timeslot 16 in all frames to all 1’s.

ODM

TCR.0

Output Data Mode

0 = TPOS and TNEG outputs are 100% duty cycle.

1 = TPOS and TNEG outputs are 50% duty cycle.

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