W90N740CD WINBOND [Winbond], W90N740CD Datasheet - Page 85

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

LBK [21]: Loop Back
Default value: 0
Set this bit to enable MAC internal loop back mode.
OPMOD [20]: Operation Mode
Default value: 0
Set this bit to enable MAC to be operated at 100Mb/s. Clear this bit to enable MAC to be operated at
10Mb/s.
EnMDC [19]: Enable MDC signal
Default value: 0
Set this bit to enable MDC clock generation. Clear this bit to disable MDC clock generation.
If users want to access the MII management data, the EnMDC bit should be set to enable MDC clock.
FDUP [18]: Full Duplex
Default value: 0
Set this bit to perform the full duplex function.
Reserved [17]:
Default value: 0
SDPZ [16]: Send Pause
Default value: 0
Set this bit to send a pause command or other MAC control packet. The SDPZ bit will be automatically
cleared after the MAC control packet has been transmitted. Write zero to this bit has no effect.
NDEF [9]: No defer
Default value: 0
Set this bit to disable defer counter.
TXON [8]: Transmit On
Default value: 0
When this bit is set, the transmission process will be started. If the bit is clear, transmissions will stop
after the current packet is transmitted completely. Users should change the bit when the MAC is in idle
state.
MAC 1 BIT [23:22]
LPCS: ENRMII
00
00
01
01
LPCS
MAC 0 BIT
[23:22]
*1
X0
X1
X0
X1
: ENRMII
INTERFACE
MAC 1
RMII
RMII
MII
MII
- 82 -
W90N740CD/W90N740CDG
INTERFACE
MAC 0
RMII
RMII
MII
MII
*1: the LPCS of MAC0 bit23
is undefined, which not
affect MAC 0 Interface.
NOTE