DS26521 datasheet(111/258 Pages) MAXIM

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DS26521 Single T1/E1/J1 Transceiver

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RDS0SEL

Receive Channel Monitor Select Register

012h

Bit #

Name

—

RCM4

RCM3

RCM2

RCM1

RCM0

Default

Bits 4 to 0: Receive Channel Monitor Bits (RCM[4:0]). RCM0 is the LSB of a 5-bit channel select that

determines which receive DS0 channel data will appear in the RDS0M register.

RSIGC

Receive-Signaling Control Register

013h

Bit #

—

RFSA1

—

RSFF

RSFE

RSIE

Name

—

CASMS

—

RSFF

RSFE

RSIE

Default

Bit 4 (T1 Mode): Receive Force Signaling All Ones (RFSA1).

0 = do not force robbed bit signaling to all ones

1 = force signaling bits to all ones on a per-channel basis according to the T1RSAOI1:T1RSAOI3 registers.

Bit 4 (E1 Mode): CAS Mode Select (CASMS).

0 = The DS26521 will initiate a resync when two consecutive multiframe alignment signals have been

received with an error.

1 = The DS26521 will initiate a resync when two consecutive multiframe alignment signals have been

received with an error, or 1 multiframe has been received with all the bits in time slot 16 in state 0.

Alignment criteria is met when at least one bit in state 1 is present in the time slot 16 preceding the

multiframe alignment signal first detected (G.732 alternate criteria).

Bit 2: Receive-Signaling Force Freeze (RSFF). Freezes receive-side signaling at RSIG (and RSER if receive-

signaling reinsertion is enabled); will override receive freeze enable (RFE).

0 = do not force a freeze event

1 = force a freeze event

Bit 1: Receive-Signaling Freeze Enable (RSFE).

0 = no freezing of receive-signaling data will occur

1 = allow freezing of receive-signaling data at RSIG (and RSER if receive-signaling reinsertion is enabled)

Bit 0: Receive-Signaling Integration Enable (RSIE).

0 = signaling changes of state reported on any change in selected channels

1 = signaling must be stable for three multiframes in order for a change of state to be reported

DS26521 Datasheet(PDF) 111 Page - Maxim Integrated Products

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