pnx1500 NXP Semiconductors, pnx1500 Datasheet - Page 695

• Manufacturer Part Number: pnx1500
• Description: Pnx15xx Series Connected Media Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Volume 1 of 1
PNX15XX_SER_3
Product data sheet
consists of three join modules, the second stage consists of two modules and the
final stage consists of one module, as depicted in
produce a single result from two inputs while doing a logic function on the two inputs.
Each of the join modules has four inputs matcha , matchb and readya , readyb and two
outputs matcho and readyo . The ready output is the logic AND of the ready inputs
( readyo = readya & readyb ). The match output of a join module depends on the two
match inputs and a logic function that can be programmed via four bits in the
PatternMatchJoin register. The pattern in each nibble of that register defines the logic
function the join module performs on the inputs to produce the output.
the bit definitions of the PatternMatchJoin register.
Table 3: PatternMatchJoin Register Nibble Functions
Nibble (binary)
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
Figure 3:
b
b
b
b
b
b
b
b
b
b
b
[3:0]
[7:4]
[11:8]
[15:12]
[19:16]
[23:20]
Pattern matching join function
Name
a & b
a & !b
!a & b
!a & !b
!(a & b)
!(a & !b)
!(!a & b)
!(!a & !b)
a ^ b
!(a ^ b)
a
Rev. 3 — 17 March 2006
Chapter 23: LAN100 — Ethernet Media Access Controller
Join01
&, |, !
Join012
&, |, !
Join0123
Join12
Function
Logic AND
Logic AND NOT
Logic NOT AND
Logic NOT AND NOT
Logic NOT OR NOT
Logic NOT OR
Logic OR NOT
Logic OR
Logic XOR
Logic XNOR
Feedthrough a
&, |, !
&, |, !
Join123
&, |, !
Join23
&, |, !
Figure
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
3. Each join module can
PNX15xx Series
JoinXXXX
&, |, !
Table 3
lists
23-26