Hi,
I am use the AD9789 in my design .
In bring up process i want to test Connectivity for LVDS an CMOS Interface Mode like it was described in "DAC - AD9789_DS p.63-64".
1. I read the data on registers 0x50 to 0x55 but it is equal to ZERO(0x00), no data.
2. When i read register 0x1F i readback the Hardware version (0x3) so SPI interface works well.
3. I see FS and DCO by the OSILLOSCOPE and the static data to DAC pins
4. Example for CMOS test:
---------------------------CODE-----------------------------
uint8_t rx = 0xFF;
//Testing Connectivity for CMOS Interface Mode
//Settings to Configure the Clock
sendSPIFrame(spi, TX_DAC, 0x00329E);
sendSPIFrame(spi, TX_DAC, 0x003080);
sendSPIFrame(spi, TX_DAC, 0x0031F0);
sendSPIFrame(spi, TX_DAC, 0x002400);
sendSPIFrame(spi, TX_DAC, 0x002480);
//Register Settings for CMOS Interface
sendSPIFrame(spi, TX_DAC, 0x002008);
sendSPIFrame(spi, TX_DAC, 0x002161);
sendSPIFrame(spi, TX_DAC, 0x00222F);
sendSPIFrame(spi, TX_DAC, 0x002387);
//Register Settings to Configure Pin Modes
sendSPIFrame(spi, TX_DAC, 0x004200);
sendSPIFrame(spi, TX_DAC, 0x004308);
sendSPIFrame(spi, TX_DAC, 0x004400);
sendSPIFrame(spi, TX_DAC, 0x004508);
sendSPIFrame(spi, TX_DAC, 0x004600);
sendSPIFrame(spi, TX_DAC, 0x004710);
sendSPIFrame(spi, TX_DAC, 0x00491C);
sendSPIFrame(spi, TX_DAC, 0x004B1C);
sendSPIFrame(spi, TX_DAC, 0x004C00);
sendSPIFrame(spi, TX_DAC, 0x004D00);
sendSPIFrame(spi, TX_DAC, 0x002400);
sendSPIFrame(spi, TX_DAC, 0x002480);
//Register Settings for BIST Pin Test
sendSPIFrame(spi, TX_DAC, 0x004880);
sendSPIFrame(spi, TX_DAC, 0x004A80);
sendSPIFrame(spi, TX_DAC, 0x004055);
//READ Signature Register Settings
rx = sendSPIFrame(spi, TX_DAC, 0x805000);
rx = sendSPIFrame(spi, TX_DAC, 0x805100);
rx = sendSPIFrame(spi, TX_DAC, 0x805200);
rx = sendSPIFrame(spi, TX_DAC, 0x805300);
rx = sendSPIFrame(spi, TX_DAC, 0x805400);
rx = sendSPIFrame(spi, TX_DAC, 0x805500);
--------------------------------------------------------------------------
!!!! rx =0 in all reads
Please help me with this test.
Thanks
Maxim,
