XRT86L30
SINGLE T1/E1/J1 FRAMER/LIU COMBO
REV. 1.0.1
TABLE 74: RECEIVE
D
ATA
L
INK
B
YTE
COUNT REGISTER
R
EGISTER 57
IT
R
ECEIVE
D
ATA
L
INK
B
YTE OUNT
C
R
EGISTER 3 (RDLBCR3)
HEX ADDRESS: 0X0155
B
F
UNCTION
TYPE
D
EFAULT
DESCRIPTION-OPERATION
7
RBUFPTR
R/W
0
Receive HDLC3 Buffer-Pointer
Identifies which RxHDLC3 buffer contains the newly received
HDLC3 message.
0 = HDLC3 message is stored in Rx HDLC3 Buffer 0.
1 = HDLC3 message is stored in Rx HDLC3 Buffer 1.
6
5
4
3
2
1
0
RDLBC6
RDLBC5
RDLBC4
RDLBC3
RDLBC2
RDLBC1
RDLBC0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
Receive HDLC Message - byte count
In MOS Mode
These seven bit-fields contain the size in bytes of the HDLC3 mes-
sage that has been extracted and written into the Rx HDLC3 buffer.
In BOS Mode
These bits should be set to the value of the message repetitions
before each receive interrupt. If they are set to “0”, no RxEOT inter-
rupt will be generated.
TABLE 75: DEVICE ID REGISTER
R
EGISTER 58
IT
D
EVICE ID REGISTER (DEVID)
0X01FE
B
FUNCTION
T
YPE
D
EFAULT
DESCRIPTION-OPERATION
7-0 DEVID[7:0]
RO
00110111 DEVID
This register is used to identify the XRT86L30 Framer/LIU. The
value of this register is 0x37h.
TABLE 76: REVISION ID REGISTER
R
EGISTER 59
UNCTION
R
EVISION ID REGISTER (REVID)
0X01FF
B
IT
F
TYPE
D
EFAULT DESCRIPTION-OPERATION
7-0 REVID[7:0]
RO
00000001 REVID
This register is used to identify the revision number of the
XRT86L30. The value of this register for revision A is 0x01h.
TABLE 77: TRANSMIT
C
HANNEL
CONTROL REGISTER 0 TO 31 E1 MODE
R
EGISTER 60-91 E1
OD
T
RANSMIT
C
HANNEL
C
ONTROL EGISTER 0-31 (TCCR 0-31)
R
HEX ADDRESS: 0X0300 TO 0X031F
M
B
IT
F
UNCTION
TYPE
D
EFAULT
DESCRIPTION-OPERATION
E
7-6
E1 LAPDcntl
R/W
10
LAPD Control
These bits select which LAPD controller is to be activated.
00 = LAPD1
01 = LAPD2
10 = TxDE[1:0] will determine the data source for the D/E
Time Slots
11 = LAPD3
81
EXAR [ EXAR CORPORATION ]
