Datasheet

59 www.national.com
4.0 Register Set (Continued)
DP83815
4.2.17 Receive Filter/Match Data Register
The RFDR register is used for reading from and writing to the internal receive filter registers, the pattern buffer memory,
and the hash table memory.
.
Bit Bit Name Description
9-0 RFADDR Receive Filter Extended Register Address
Selects which internal receive filter register is accessible via RFDR:
Perfect Match Register (PMATCH)
000h - PMATCH octets 1-0
002h - PMATCH octets 3-2
004h - PMATCH octets 5-4
Pattern Count Registers (PCOUNT)
006h - PCOUNT1, PCOUNT0
008h - PCOUNT3, PCOUNT2
SecureOn Password Register (SOPAS)
00Ah - SOPAS octets 1-0
00Ch - SOPAS octets 3-2
00Eh - SOPAS octets 5-4
Filter Memory
200h-3FE - Rx filter memory (Hash table/pattern buffers)
Tag: RFDR Size: 32 bits Hard Reset: 00000000h
Offset: 004Ch Access: Read Write Soft Reset: 00000000h
Bit Bit Name Description
31-18 unused
17-16 BMASK Byte mask
Used as byte mask values for pattern match template data.
15-0 RFDATA Receive Filter Data
Obsolete