Datasheet

W5500 Datasheet Version1.0.9 23 / 66
N-Bytes Read Access Example
When the Host reads 5 Bytes Data (0xAA, 0xBB, 0xCC, 0xDD, 0xEE) from the Socket
3s RX Buffer Block 0x0100 Address by using VDM mode, 5 bytes data are read with the
SPI Frame as below.
Offset Address = 0x0100
BSB[4:0] = 01111
RWB = 0
OM[1:0] = ‘00’
1
st
Data = 0xAA
2
nd
Data = 0xBB
3
rd
Data = 0xCC
4
th
Data = 0xDD
5
th
Data = 0xEE
The N-Bytes Read Access is shown in Figure 13.
The 5 bytes of Data (0xAA, 0xBB, 0xCC, 0xDD, 0xEE) are read sequentially from the
Socket 3s Rx Buffer Block Address 0x0100 ~ 0x0104.
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 the SPI Frame Data
Phase.
Figure 13. 5 Byte Data Read at Socket 3 RX Buffer Block 0x0100 in VDM mode
SCSn
SCSn