My English is not good , so don't mind.
MCU:SILICON LABS C8051FX20-TB 晶片:C8051F120
evaluation board:ANALOG DEVICES AD9954
AD9954 evaluation board:
only use DUT1
U13:PS0、PS1、OSK、I/O SYNC、PD are ground
CLKMODESEL=1.8V，RB_ENABLE don't connect anything
SCLK、SDIO、FUD、RESET、CS connect with Port4 of 8051
SDIO(Logic 1)=2.8V，other Pin(logic 1)為3.3V，I don't know why that happen.
REF_CLK_DUT1 connect to signal generator(12MHz Square wave 150mVpp offset:75mV)
because no Oscillator on board.
Code(use C code):
使用:Silicon Laboratories IDE編輯
Q1:Why don't I get the data of CFR2 by using SDO?
Q2:No output ?
Q3:Why the logic 1 of SDIO pin is 2.8V