CS62180A-IP View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS62180A-IP

T1 Framer

Cirrus Logic 

CS62180A

CS62180B

RMSYNC - Receive Multiframe Sync, Pin 28 (PLCC, Pin 32).

Rising edge signals the F-bit of 1st frame of multiframe. RMSYNC runs on 50% duty cycle,

high for frames 1-6 in 193S mode, distinguishing signaling channels A and B. In 193E mode,

it’s high for frames 1-12, and can be used with RSIGSEL to distinguish channels A, B, C, and

D.

RSIGFR - Receive Signaling Frame, Pin 30 (PLCC, Pin 34).

High during signaling frames, low at all other times, including resync. Serves no purpose in

T1DM mode.

RSIGSEL - Receive Signaling Select, Pin 31 (PLCC, Pin 35).

In 193E mode, RSIGSEL goes high for frames 1-6 and 13-18, identifying signaling channels A

and C. Used together with RMSYNC, which is high for channels A and B, it allows identifica-

tion of all 4 signaling channels. In 193S mode, RSIGSEL goes high for frames 1-3 and 7-9.

Serves no purpose in T1DM mode. In SLC-96® mode, RSIGSEL goes high in those frames

where Fs bits (frames 59 to 11) and the last spolier bit (frame 58) are present; goes low in all

other frames (frames 12 to 57).

Miscellaneous

TEST - Test Mode, Pin 32 (PLCC, Pin 36).

Tie to VSS for normal operation. Factory use only.

42

DS225PP1

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