DS2155 datasheet(20/262 Pages) DALLAS

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DS2156

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Signal Name:

TLCLK

Signal Description:

Transmit Link Clock

Signal Type:

Output

Demand clock for the transmit link data [TLINK] input.

T1 Mode: A 4kHz or 2kHz (ZBTSI) clock.

E1 Mode: A 4kHz to 20kHz clock.

Signal Name:

TLINK

Signal Description:

Transmit Link Data

Signal Type:

Input

If enabled, this pin is sampled on the falling edge of TCLK for data insertion into either the FDL stream (ESF) or

the Fs-bit position (D4), or the Z-bit position (ZBTSI) or any combination of the Sa-bit positions (E1).

Signal Name:

TSYNC

Signal Description:

Transmit Sync

Signal Type:

Input/Output

A pulse at this pin establishes either frame or multiframe boundaries for the transmit side. Can be programmed to

output either a frame or multiframe pulse. If this pin is set to output pulses at frame boundaries, it can also be set by

IOCR1.3 to output double-wide pulses at signaling frames in T1 mode.

Signal Name:

TSSYNC

Signal Description:

Transmit System Sync

Signal Type:

Input

Only used when the transmit-side elastic store is enabled. A pulse at this pin establishes either frame or multiframe

boundaries for the transmit side. Should be connected low in applications that do not use the transmit-side elastic

store.

Signal Name:

TSIG

Signal Description:

Transmit Signaling Input

Signal Type:

Input

When enabled, this input samples signaling bits for insertion into outgoing PCM data stream. Sampled on the

falling edge of TCLK when the transmit-side elastic store is disabled. Sampled on the falling edge of TSYSCLK

when the transmit-side elastic store is enabled.

Signal Name:

TESO

Signal Description:

Transmit Elastic Store Data Output

Signal Type:

Output

Updated on the rising edge of TCLK with data out of the transmit-side elastic store whether the elastic store is

enabled or not. This pin is normally connected to TDATA.

Signal Name:

TDATA

Signal Description:

Transmit Data

Signal Type:

Input

Sampled on the falling edge of TCLK with data to be clocked through the transmit-side formatter. This pin is

normally connected to TESO.

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