XRT79L71 Datasheet, PDF (376/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

XRT79L71
REV. P1.0.3
PRELIMINARY
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1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
TRANSMIT ATM CELL PROCESSOR BLOCK - TRANSMIT TEST CELL HEADER BYTE - BYTE 4
(ADDRESS = 0X1F23)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Transmit Test Cell Header Byte 4 [7:0]
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
BIT NUMBER
NAME
7-0
Transmit Test Cell
Header Byte 4[7:0]
TYPE
DESCRIPTION
R/W Receive Test Cell Header Byte 4:
These READ/WRITE register bits along with that in the "Transmit ATM
Cell Processor Block - Transmit Cell Header Byte - Bytes 1 through 3"
permit the user to define the headers of test cells that the Transmit
Test Cell Generator will generate.
This particular register byte permits the user to define the contents of
Header Byte # 4.
NOTE: These register bits are only active if the Transmit Test Cell
Generator has been enabled.
TRANSMIT ATM CELL PROCESSOR BLOCK - TRANSMIT ATM CELL COUNTER - BYTE 3 (ADDRESS =
0X1F28)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Transmit ATM Cell Count[31:24]
RUR
RUR
RUR
RUR
RUR
RUR
RUR
RUR
0
0
0
0
0
0
0
0
BIT NUMBER
NAME
7-0
Transmit ATM Cell
Count[31:24]
TYPE
DESCRIPTION
RUR
Transmit ATM Cell Count - Byte 3[31:24]:
This RESET-upon-READ register, along with the "Transmit ATM Cell
Count - Bytes 2 through 0" registers, contain a 32-bit value for the
number of User/Valid cells that have been transmitted by the Transmit
ATM Cell Processor block.
This particular register contains the MSB (Most Significant Byte) value
for this 32-bit expression.
NOTES:
1. The contents within these registers include all of the
following: All ATM cells that have been read out from the
TxFIFO, or the Transmit Cell Insertion Buffer.
2. The contents of these registers do not include the number of
Idle Cells that have been generated by the Transmit ATM Cell
Processor block.
3. If the number of Cells reaches the value "0xFFFFFFFF" then
these registers will saturate to and remain at this value (e.g.,
it will NOT overflow to "0x00000000").
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