DS21554 Просмотр технического описания (PDF) - Maxim Integrated

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DS21554

3.3V/5V E1 Single-Chip Transceivers

Maxim Integrated 

DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers

Signal Name:

RFSYNC

Signal Description: Receive Frame Sync

Signal Type:

Output

An extracted 8kHz pulse, one RCLK wide, is output at this pin that identifies frame boundaries.

Signal Name:

RMSYNC

Signal Description: Receive Multiframe Sync

Signal Type:

Output

If the receive-side elastic store is enabled, an extracted pulse, one RSYSCLK wide, is output at this pin

that identifies multiframe boundaries. If the receive-side elastic store is disabled, then this output will

output multiframe boundaries associated with RCLK.

Signal Name:

RDATA

Signal Description: Receive Data

Signal Type:

Output

Updated on the rising edge of RCLK with the data out of the receive-side framer.

Signal Name:

RSYSCLK

Signal Description: Receive System Clock

Signal Type:

Input

1.544MHz, 2.048MHz, 4.096MHz, or 8.192MHz clock. Only used when the receive-side elastic store

function is enabled. Should be tied low in applications that do not use the receive-side elastic store. See

Section 17 for details on 4.096MHz and 8.192MHz operation using the Interleave Bus Option.

Signal Name:

RSIG

Signal Description: Receive Signaling Output

Signal Type:

Output

Outputs signaling bits in a PCM format. Updated on rising edges of RCLK when the receive-side elastic

store is disabled. Updated on the rising edges of RSYSCLK when the receive-side elastic store is enabled.

Signal Name:

RLOS/LOTC

Signal Description: Receive Loss of Sync / Loss of Transmit Clock

Signal Type:

Output

A dual function output that is controlled by the TCR2.0 control bit. This pin can be programmed to either

toggle high when the synchronizer is searching for the frame and multiframe or to toggle high if the

TCLK pin has not been toggled for 5ms.

Signal Name:

RCL

Signal Description: Receive Carrier Loss

Signal Type:

Output

Set high when the line interface detects a carrier loss.

Signal Name:

RSIGF

Signal Description: Receive Signaling Freeze

Signal Type:

Output

Set high when the signaling data is frozen via either automatic or manual intervention. Used to alert

downstream equipment of the condition.

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