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W5500 Datasheet(PDF) 20 Page - WIZnet Co., Ltd |
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W5500 Datasheet(HTML) 20 Page - WIZnet Co., Ltd |
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20 / 66 page  20 / 66 W5500 Datasheet Version1.0.9 N-Bytes WRITE Access Example When the Host writes 5 Bytes Data (0x11, 0x22, 0x33, 0x44, 0x55) to Socket 1’s TX Buffer Block 0x0040 Address by using VDM mode, 5 bytes data are written with the SPI Frame below. Offset Address = 0x0040 BSB[4:0] = ‘00110’ RWB = ‘1’ OM[1:0] = ‘00’ 1st Data = 0x11 2nd Data = 0x22 3rd Data = 0x33 4th Data = 0x44 5th Data = 0x55 The N-Bytes Write Access is shown in Figure 10. The 5 bytes of Data (0x11, 0x22, 0x33, 0x44, 0x55) are written sequentially to Socket 1’s Tx Buffer Block Address 0x0040 ~ 0x0044. The External Host asserts (High-to-Low) SCSn before transmitting SPI Frame. The External Host de-asserts (Low-to-High) the SCSn at the end of SPI Frame transmit. Figure 10. 5 Byte Data Write at 1th Socket’s TX Buffer Block 0x0040 in VDM mode SCSn SCSn |
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