Rainbow Electronics DS2182A User Manual

Page 13

DS2182A

041995 13/22

RCR2: RECEIVE CONTROL REGISTER 2 Figure 13

(MSB)

(LSB)

–

BVCRF

SFYEL

B8ZS

–

SYMBOL

POSITION

NAME AND DESCRIPTION

RCR2.7

Reserved; must be 0 for proper operation.

RCR2.6

Reserved; must be 0 for proper operation.

BVCRF

RCR2.5

Bipolar Violation Count Register Function Select.
0 = do not count excessive zeros
1 = count excessive zeros

RCR2.4

Frame Mode.
1 = Extended Superframe (193E, 24 frames per Superframe).
0 = Superframe (193S or D4, 12 frames per Superframe).

SFYEL

RCR2.3

SF Yellow Mode Select.
1 = 1 in the S-bit position of frame 12.
0 = 0 in bit 2 of all channels.

B8ZS

RCR2.2

Bipolar Eight Zero Substitution.
1 = B8ZS enabled.
0 = B8ZS disabled.

RCR2.1

Reserved; must be 0 for proper operation.

RCR2.0

Reserved; must be 0 for proper operation.

193S RECEIVE MULTIFRAME TIMING Figure 14

ЙЙЙЙЙЙЙ

ЙЙЙЙЙЙЙЙ

FRAME#

RFSYNC

RMSYNC

RSIGSEL

RSIGFR

RLCLK

RABCD

RLINK

NOTES:

1. Signaling data is updated during signaling frames on channel boundaries. Pin RABCD is the LSB of each

channel word in non-signaling frames.

2. RLINK data (S-bit) is updated one bit-time prior to S-bit frames and held for two frames.