W3150A+ WIZnet, W3150A+ Datasheet - Page 57

• Manufacturer Part Number: W3150A+
• Description: Ethernet ICs ENET CONTR TCP/IP+MAC
• Manufacturer: WIZnet

Specifications of W3150A+

• Rohs: yes
• Product: Ethernet Transceivers
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 3 V
• Maximum Operating Temperature: + 80 C
• Package / Case: LQFP-64
• Ethernet Connection Type: 10Base-T, 100Base-TX
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT

6.4. MII (Media Independent Interface)
The MII handles the data transfer between the W3150A+ and the Physical Layer Device.
The MII is composed of TX_CLK, TXE, and TXD[0:3] signals for sending data and RX_CLK, CRS, RXDV,
RXD[0:3], and COL signals for receiving data.
When sending data from the W3150A+, TXE and TXD[0:3] are output in synchronization with the falling
edges of TX_CLK input from the Physical Layer Device because Physical Layer Devices generally recognize
the rising edges of TX_CLK.
When receiving data, in general, the Physical Layer Devices output CRS, RXDV, RXD[0:3], and COL signals
in synchronization with the falling edges of RX_CLK, so the W3150A+ recognizes the signals at the rising
edges of RX_CLK.
▫ 4. Write desired value for transmission on SPDR register (SPI Data Register).
▫ 5. Configure /SS as ‘Low’ (data transfer start)
▫ 6. Wait for reception complete
▫ 7. If all data transmission ends, configure /SS as ‘High’
SPI write/read operation timing is as below.
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