W90N740CD WINBOND [Winbond], W90N740CD Datasheet - Page 112

• Manufacturer Part Number: W90N740CD
• Description: 32-Bit ARM7TDMI-Based Micro-Controller
• Manufacturer: WINBOND [Winbond]

NATA comparison and replacement table at different port
6.6.2.7. Possible Settings for Different Applications, only for reference
There are still some restrictions of configuration table above. It cannot be replaced the
Address or Port without compare them first.
MAC Address Registers (EXMACM, EXMACL, INMACM, INMACL, LSMACxM, LSMACxL,
RSMACxM, RSMACxL)
The MAC address registers are to store the MAC address of each EMC port. When the NATA is enabled
and corresponding entry is hit, the MAC address translation from one port to another port must be done
by hardwire, instead of by software. Thus the user must set the MAC address of each port for NAT to
translate.
{EXMACM, EXMACL (INMACM, INMACL)}: MAC address (6 bytes), with 2 bytes in EXMACL
{LSMACxM, LSMACxL (RSMACxM, RSMACxL)}: MAC address (6 bytes), with 2 bytes in LSMACxL
For example, if the External MAC address is desired to store 12-34-56-78-90-13, then the content of
EXMACM is 12-34-56-78, and the content of EXMACL is 90-13-00-00.
NAT with port
comparison
NAT without port
comparison
IP filter
(for receiving
(for receiving
local station
WAN port
LAN port
packets)
packets)
external
COMPARISON
(if AxCE set)
(if PxCE set)
(if AxCE set)
(if PxCE set)
AxCE
DA with MA
DP with MP
SA with LA
SP with LP
1
1
1
INVERSE BIT IS RESET
PxCE
1
0
1
AxRE
REPLACEMENT
1
1
0
(if AxRE set)
(if PxRE set)
(if AxRE set)
(if PxRE set)
SA with MA
SP with MP
DA with LA
DP with LP
PxRE
- 109 -
1
0
0
W90N740CD/W90N740CDG
(INMACL) and 4 bytes in EXMACM (INMACM)
(RSMACxL)
(RSMACxM)
I bit
0
0
1
Publication Release Date: September. 19, 2005
COMPARISON
Comparison IP address and port number
Comparison IP address
The S/W program can discard the hit
packets for filtering
(if AxCE set)
(if PxCE set)
(if AxCE set)
(if PxCE set)
SA with MA
SP with MP
DA with LA
DP with LP
and
INVERSE BIT IS SET
4
Description
bytes
REPLACEMENT
(if AxRE set)
(if PxRE set)
DA with MA
(if AxRE set)
(if PxRE set)
DP with MP
SA with LA
SP with LP
in
Revision A7
LSMACxM