W90N740CD WINBOND [Winbond], W90N740CD Datasheet - Page 84

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

MAC Command Register (MCMDR_0, MCMDR_1)
The MAC command register provides global control information for the MAC. MAC command register
settings affect both transmission and reception. The user can also control transmit and receive operation
separately. To select customized operating features, users should write this register during system
initialization. This way, users will not need to write or read it again during normal operation. However, if
users change setting during operation, the updated setting will take effect after the current frame is
completed.
Reserved [25]:
Default value: 0
LAN [24]: LAN Port Setting Mode
Default value: 0
Set this bit to set this EMC port as a LAN port, and clear this bit to set the EMC port as a WAN port.
The S/W program must initial an EMC as a LAN port, and another EMC as a WAN port (for example,
EMC 0 as a LAN port and EMC 1 as a WAN port) to let the NAT accelerator work properly.
LPCS [23]: Low Pin Count Package Switch
Always set: 0
EnRMII [22]: Enable RMII
Default value: 0
Set this bit to select RMII interface.
MCMDR_0
MCMDR_1
REGISTER
LPCS
31
23
15
7
Reserved
0xFFF0.308C
0xFFF0.388C
EnRMII
ADDRESS
30
22
14
6
SPCRC
LBK
29
21
13
5
R/W
R/W
R/W
Reserved
Reserved
OPMOD
MAC Command Register
MAC Command Register
AEP
28
20
12
4
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W90N740CD/W90N740CDG
DESCRIPTION
EnMDC
ACP
27
19
11
3
Publication Release Date: September. 19, 2005
FDUP
ARP
26
18
10
2
Reserved
Reserved
NDEF
ALP
25
17
9
1
RESET VALUE
0x0000.0000
0x0000.0000
Revision A7
TXON
RXON
SDPZ
LAN
24
16
8
0