USB4604 Datasheet, PDF (37/71 Pages) SMSC Corporation – USB 2.0 HSIC Hi-Speed 4-Port Hub Controller

USB 2.0 HSIC Hi-Speed 4-Port Hub Controller
Datasheet
7.1.7
Command Only Program Example
To perform a single byte command such as the following:
- WRDI
- WREN
- EWSR
- CHIP_ERASE
- EBSY
- DBSY
The device writes the opcode into the first byte of the SPI_CMD_BUF and the SPI_CMD_LEN is set
to one. The device first drives SPI_CE_N low, then 8 bits of the command are clocked out on SPI_DO.
SPI_DI is not used in this example.
SPI_CE_N
SPI_CLK
01 2 34 5 6 7
SPI_DO
Command
MSB
SPI_DI
HIGH IMPEDANCE
Figure 7.5 SPI Command Only Sequence
SMSC USB4604
37
DATASHEET
Revision 1.0 (06-17-13)