XRT79L71 Datasheet, PDF (321/441 Pages) Exar Corporation – 1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

áç
PRELIMINARY
1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC
XRT79L71
REV. P1.0.3
RECEIVE ATM CELL PROCESSOR BLOCK - RECEIVE USER CELL FILTER # 1 - FILTERED CELL
COUNT - BYTE 1 (ADDRESS = 0X175E)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
User Cell Filter # 1 - Filtered Cell Count[15:8]
RUR
RUR
RUR
RUR
RUR
RUR
RUR
RUR
0
0
0
0
0
0
0
0
BIT NUMBER
NAME
7-0
User Cell Filter # 1 - Fil-
tered Cell Count[15:8]
TYPE
RUR
DESCRIPTION
User Cell Filter # 1 - Filtered Cell Count[15:8]:
These RESET-upon-READ bit-fields, along with that in the
"Receive ATM Cell Processor Block - Receive User Cell Filter # 1
- Filtered Cell Count - Bytes 3, 2 and 0" register contain a 32-bit
expression for the number of User Cells that have been filtered
by User Cell Filter # 1 since the last read of this register.
Depending upon the configuration settings within the "Receive
ATM Cell Processor Block - Receive User Cell Filter Control -
User Cell Filter # 1" Register (Address = 0x1753), these register
bits will be incremented anytime User Cell Filter # 1 performs
any of the following functions.
• Discards an incoming "User Cell".
• Copies (or Replicates) an incoming "User Cell" and routes the
"copy" to the Receive Cell Extraction Buffer.·
• Both the above actions.
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").
309