CS62180 datasheet(11/50 Pages) CIRRUS

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193S Yellow Alarm Format

CCR.3: YELS

The CS62180B supports two different

yellow alarm formats for 193S framing.

Whichever format is selected, it will be used by

both the transmit side, for yellow alarm genera-

tion, and the receive side, for alarm detection.

When using 193S framing, a "0" in YELS

(CCR.3) will encode/decode yellow alarms as a

"0" in bit 2 (2

nd MSB) of all channels. Setting

CCR.3 to "1" will cause yellow alarms to be en-

coded/decoded as a "1" is the S-bit position of

frame 12.

Note: For T1DM and SLC-96

®, CCR.3 should

be set to a "0".

Framing Format

CCR.4: FM

CCR.7: FM1

As shown in Figure 4b, CCR.4 and CCR.7 select

the framing format.

See the text for

the Transmit Control Register (TCR) and Re-

ceive Control Register (RCR) for further

information on the particular options available

for each framing format.

Note:

Changing the framing mode does not

force the receiver to resynchronize. A forced

resync should be done to insure correct receiver

synchronization after the framing mode is

changed.

193E Yellow Alarm Format

CCR.5: EYELMD

The CS62180B supports two different

yellow alarm formats for 193E framing.

Whichever format is selected, it will be used by

both the transmit side, for yellow alarm genera-

tion, and the receive side, for alarm detection.

When using 193E framing, a "0" in EYELMD

(CCR.5) will encode/decode yellow alarms as a

repeating sequence of 00FF (hex) on the 4 kHz

facility data link (FDL). If CCR.5 is set, 193E

yellow alarms will be handled as a "0" in bit 2

nd MSB) of all channels.

Control of RSR.2

CCR.6: FRSR2

CCR.6 allows you to change the meaning of D2

in the Receive Status Register (RSR.2). If CCR.6

is clear, RSR.2 will report the detection of B8ZS

codes in the received T1 input. If CCR.6 is set to

a "1", RSR.2 will be used to signal a Change of

Frame Alignment (COFA). A COFA is reported

when the last receiver resync resulted in a

change of framing or multiframing alignment.

Refer to the description of the Receive Status

FM1

Format Selected

193S (D4)

193E (ESF)

SLC-96

T1DM

Figure 4b. Framing Format Selection

CS62180B

DS225PP2

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