Preliminary Technical Data UG-1828
Rev. PrC | Page 51 of 338
Figure 26. 3-Wire SPI Timing with Parameter Labels, SPI Read
SPI TEST
ADRV9001 has a scratch SPI resister 0x009 for users to perform the SPI read/write validation. Users can follow below procedure to
quickly check the SPI function before the relative BBIC drivers are ready.
• Power on the ADRV9001 properly
• Toggle the resetb pin to reset the ADRV9001
• Write register 0x0 with value 0x3C to set ADRV9001 SPI to 4 wire mode, or with value 0x24 to set ADRV9001 SPI to 3 wire
mode
• Write whatever value to scratch register 0x009, then read register 0x009 to validate if the read value is the write one
Users should use the oscilloscope to probe the SPI bus signal and check if the SPI master follow the timing diagrams in Figure 24 and
Figure 25 when above SPI validation can’t pass.
Users can also use the API adi_adrv9001_spi_Verify() to validate the SPI after the adi_adrv9001_spi_Configure() is set if the BBIC has
the available drivers.
SDIO
CSB
DON’T CARE
DON’T CARE
DON’T CARE
DON’T CARE
SCLK
t
SC
t
MP
t
CP
t
S
t
H
t
HZM
t
HC
t
CO
24159-023
R/W A14 A13 A12 A11
A10
A9 A8
A7
A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
To Next Page
Loading...
Need help?
General
