參數(shù)資料
型號: T9000
廠商: Lineage Power
英文描述: ISDN Network Termination Node (NTN) Device(ISDN網絡終端節(jié)點器件)
中文描述: ISDN網絡終端節(jié)點(新界西)設備(ISDN網網絡終端節(jié)點器件)
文件頁數(shù): 61/126頁
文件大?。?/td> 1523K
代理商: T9000
Lucent Technologies Inc.
61
Advance Data Sheet
April 2000
ISDN Network Termination Node (NTN) Device
T9000
9 HDLC with FIFO Module
(continued)
9.5 HDLC Register Set
(continued)
Table 59. HTSA: HDLC Transmit FIFO Space Available (0x1C)
Table 60. HRDA: HDLC Receive FIFO Data Available (0x1D)
Table 61. HTX: HDLC Transmit Data (0x1E)
Reg
HTSA
RESET
R/W
R
Default
Bit 7
Bit 6
TSP6
1
Bit 5
TSP5
0
Bit 4
TSP4
0
Bit 3
TSP3
0
Bit 2
TSP2
0
Bit 1
TSP1
0
Bit 0
TSP0
0
Bit #
7
6—0
Symbol
Name/Description
Reserved.
Transmitter Space.
This register contains the number of empty positions in the transmit-
ter FIFO.
TSP[6:0]
Reg
HRDA
RESET
R/W
R
Default
Bit 7
SWRF
Bit 6
NBNSW6
Bit 5
NBNSW5
Bit 4
NBNSW4
Bit 3
NBNSW3
Bit 2
NBNSW2
Bit 1
NBNSW1
Bit 0
NBNSW0
Bit #
7
Symbol
SWRF
Name/Description
Status Word on Receive FIFO.
The HDLC receiver module asserts this bit whenever
there is a status word in the receive FIFO.
0: No status word.
1: Status word.
Number of Bytes Until Next Status Word
. These bits indicate how many bytes are
present in the receive FIFO. If SWRF (bit 7) is equal to 1, indicating that a status word is
available in the FIFO, then NBNSW[6:0] indicates the number of bytes in the receive
FIFO up to and including the status byte. If SWRF is equal to 0, indicating that no status
words are available in the FIFO, then NBNSW[6:0] indicates the total number of data
bytes in the receive FIFO.
6—0
NBNSW[6:0]
Reg
HTX
RESET
R/W
W
Default
Bit 7
TXD7
Bit 6
TXD6
Bit 5
TXD5
Bit 4
TXD4
Bit 3
TXD3
Bit 2
TXD2
Bit 1
TXD1
Bit 0
TXD0
Bit #
7—0
Symbol
TXD[7:0]
Name/Description
HDLC Transmit Data.
Data to be transmitted is written to this register, which maps into
the transmit FIFO. The last byte of each packet must be written to register HTXL (see
Table 62).
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