XRT79L71 Datasheet, PDF (439/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

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PRELIMINARY
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
XRT79L71
REV. P1.0.3
TRANSMIT ATM CELL PROCESSOR BLOCK - TRANSMIT USER CELL FILTER # 3 - FILTERED CELL
COUNT - BYTE 0 (ADDRESS = 0X1F6F)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Transmit User Cell Filter # 3 - Filtered Cell Count[7:0]
RUR
RUR
RUR
RUR
RUR
RUR
RUR
RUR
0
0
0
0
0
0
0
0
BIT NUMBER
NAME
7-0
Transmit User Cell
Filter # 3 - Filtered Cell
Count[7:0]
TYPE
RUR
DESCRIPTION
Transmit User Cell Filter # 3 - Filtered Cell Count[7:0]:
These RESET-upon-READ bit-fields, along with that in the
"Transmit ATM Cell Processor Block - Transmit User Cell Filter #
3 - Filtered Cell Count - Bytes 3" through "1" register contain a
32-bit expression for the number of User Cells that have been fil-
tered by Transmit User Cell Filter # 3 since the last read of this
register.
Depending upon the configuration settings within the "Transmit
ATM Cell Processor Block - Transmit User Cell Filter Control -
Transmit User Cell Filter # 3" Register (Address = 0x1F63),
these register bits will be incremented anytime Transmit User
Cell Filter # 3 performs any of the following functions.
• Discards an incoming "User Cell".· Copies (or Replicates) an
incoming "User Cell" and routes the "copy" to the Transmit Cell
Extraction Buffer.
• both the above actions.This particular register contains the
LSB (Least Significant Byte) value for this 32-bit expression.
NOTE:
If the number of "filtered 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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