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(29) Drop cell header pattern register (DCHP)
The DCHP register sets the header pattern of a receive cell to be discarded as an invalid cell. By default, the
idle cells are dropped.
Register
Name
Port0:
DCHP
008C H
31
30
29
28
15
14
13
12
GFC[3:0]
Bit
Field
D31-
Reserved
Set to 0.
D16
D15-
GFC[3:0]
A receive cell with VPI/VCI being all 0 is verified with the pattern that is the cell
D12
header area other than the VPI/VCI area set in this area. The cell that coincides
with the pattern in this area is not stored to the receive FIFO but dropped. However,
D11-D9
PTI[2:0]
the bit that is masked by the low-order eight bits of this area is not masked but
D8
CLP
treated as Don't Care.
D7-D4
GFCM[3:0]
This field masks the high-order eight bits.
The bit of the cell header that is set to 1 in this area is not verified with the bit setting
D3-D1
PTIM[2:0]
of the high-order eight bits.
D0
CLPM
202
CHAPTER 5 REGISTERS
Address
Port1:
Port2:
Port3:
048C H
088C H
0C8C H
27
26
25
24
Reserved
11
10
9
8
PTI[2:0]
CLP
PRELIMINARY
Access
Default
R/W
00000100 H
23
22
21
20
7
6
5
4
GFCM[3:0]
Function
19
18
17
16
3
2
1
0
PTIM[2:0]
CLPM
Default
0
0000
000
1
0000
000
0
NEC confidential and Proprietary
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