DS2155 datasheet(49/238 Pages) DALLAS

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DS2155

49 of 238

T1TCR2

T1 Transmit Control Register 2

06h

Bit #

Name

TB8ZS

TSLC96

TZSE

FBCT2

FBCT1

TD4YM TZBTSI

TB7ZS

Default

Bit 0/Transmit-Side Bit 7 Zero-Suppression Enable (TB7ZS)

0 = no stuffing occurs

1 = bit 7 forced to a 1 in channels with all 0s

Bit 1/Transmit-Side ZBTSI Support Enable (TZBTSI). Allows ZBTSI information to be input on TLINK pin.

0 = ZBTSI disabled

1 = ZBTSI enabled

Bit 2/Transmit-Side D4 Yellow Alarm Select (TD4YM)

0 = 0s in bit 2 of all channels

1 = a 1 in the S-bit position of frame 12

Bit 3/F-Bit Corruption Type 1 (FBCT1). A low-to-high transition of this bit causes the next three consecutive Ft

(D4 framing mode) or FPS (ESF framing mode) bits to be corrupted causing the remote end to experience a loss of

synchronization.

Bit 4/F-Bit Corruption Type 2 (FBCT2). Setting this bit high enables the corruption of one Ft (D4 framing mode)

or FPS (ESF framing mode) bit in every 128 Ft or FPS bits as long as the bit remains set.

Bit 5/Transmit FDL Zero-Stuffer Enable (TZSE). Set this bit to 0 if using the internal HDLC controller instead

of the legacy support for the FDL. See Section 15 for details.

0 = zero stuffer disabled

1 = zero stuffer enabled

Bit 6/Transmit SLC-96/Fs-Bit Insertion Enable (TSLC96). Only set this bit to a 1 in D4 framing applications.

Must be set to 1 to source the Fs pattern from the TFDL register. See Section 23.6 for details.

0 = SLC-96/Fs-bit insertion disabled

1 = SLC-96/Fs-bit insertion enabled

Bit 7/Transmit B8ZS Enable (TB8ZS)

0 = B8ZS disabled

1 = B8ZS enabled

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