Thc2, Sboc = 1, Thbse – Rainbow Electronics DS26519 User Manual

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DS26519 16-Port T1/E1/J1 Transceiver

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THBSE

Transmit HDLC Bit Suppress

111h + (200h x (n - 1)) + (2000h x [(n - 1) / 8]): where n = 1 to 16

Bit

# 7 6 5 4 3 2 1 0

Name TBSE8 TBSE7 TBSE6 TBSE5 TBSE4 TBSE3 TBSE2 TBSE1
Default

0 0 0 0 0 0 0 0

Bit 7: Transmit Bit 8 Suppress (TBSE8). MSB of the channel. Set to one to stop this bit from being used.

Bit 6: Transmit Bit 7 Suppress (TBSE7). Set to one to stop this bit from being used.

Bit 5: Transmit Bit 6 Suppress (TBSE6). Set to one to stop this bit from being used.

Bit 4: Transmit Bit 5 Suppress (TBSE5). Set to one to stop this bit from being used.

Bit 3: Transmit Bit 4 Suppress (TBSE4). Set to one to stop this bit from being used.

Bit 2: Transmit Bit 3 Suppress (TBSE3). Set to one to stop this bit from being used.

Bit 1: Transmit Bit 2 Suppress (TBSE2). Set to one to stop this bit from being used.

Bit 0: Transmit Bit 1 Suppress (TBSE1). LSB of the channel. Set to one to stop this bit from being used.

THC2

Transmit HDLC Control Register 2

113h + (200h x (n - 1)) + (2000h x [(n - 1) / 8]): where n = 1 to 16

Bit

# 7 6 5 4 3 2 1 0

Name TABT SBOC THCEN THCS4 THCS3 THCS2 THCS1 THCS0

TABT

—

THCEN THCS4 THCS3 THCS2 THCS1 THCS0

Default

0 0 0 0 0 0 0 0

Bit 7: Transmit Abort (TABT). A 0-to-1 transition will cause the FIFO contents to be dumped and one FEh abort to
be sent followed by 7Eh or FFh flags/idle until a new packet is initiated by writing new data into the FIFO. Must be
cleared and set again for a subsequent abort to be sent.

Bit 6: Send BOC (SBOC) (T1 Mode Only). Set = 1 to transmit the BOC code placed in bits 0 to 5 of the

T1TBOC

0 = Transmit HDLC Controller is not enabled

1 = Transmit HDLC Controller is enabled

Bits 4 to 0: Transmit HDLC Channel Select (THCS[4:0]). Determines which DSO channel will carry the HDLC
message if enabled. Changes to this value are acknowledged only upon a transmit HDLC controller reset (THR at

THC1

.5).