Datasheet

DS21352/DS21552
76 of 137
0 = source FDL data from the TLINK pin
1 = source FDL data from the onboard HDLC and BOC controller
BOC5 TBOC.5 BOC Bit 5. Last bit transmitted of the 6–bit codeword.
BOC4 TBOC.4
BOC Bit 4.
BOC3 TBOC.3
BOC Bit 3.
BOC2 TBOC.2
BOC Bit 2.
BOC1 TBOC.1
BOC Bit 1.
BOC0 TBOC.0 BOC Bit 0. First bit transmitted of the 6–bit codeword.
THFR: TRANSMIT HDLC FIFO (Address=08 Hex)
(MSB) (LSB)
THFR7 THFR6 THFR5 THFR4 THFR3 THFR2 THFR1 THFR0
SYMBOL POSITION NAME AND DESCRIPTION
THFR7 THFR.7 HDLC Data Bit 7. MSB of a HDLC packet data byte.
THFR6 THFR.6
HDLC Data Bit 6.
THFR5 THFR.5
HDLC Data Bit 5.
THFR4 THFR.4
HDLC Data Bit 4.
THFR3 THFR.3
HDLC Data Bit 3.
THFR2 THFR.2
HDLC Data Bit 2.
THFR1 THFR.1
HDLC Data Bit 1.
THFR0 THFR.0 HDLC Data Bit 0. LSB of a HDLC packet data byte.
RDC1: RECEIVE HDLC DS0 CONTROL REGISTER 1 (Address=90 Hex)
(MSB) (LSB)
RDS0E - RDS0M RD4 RD3 RD2 RD1 RD0
SYMBOL POSITION NAME AND DESCRIPTION
RDS0E RDC1.7
HDLC DS0 Enable.
0 = use the receive HDLC controller for the FDL.
1 = use the receive HDLC controller for one or more DS0 channels.
-RDC1.6Not Assigned. Should be set to 0.
RDS0M RDC1.5
DS0 Selection Mode.
0 = utilize the RD0 to RD4 bits to select which single DS0 channel to use.
1 = utilize the RCHBLK control registers to select which DS0 channels to use.
RD4 RDC1.4 DS0 Channel Select Bit 4. MSB of the DS0 channel select.
RD3 RDC1.3
DS0 Channel Select Bit 3.
RD2 RDC1.2
DS0 Channel Select Bit 2.