EVAL-AD1896EB AD [Analog Devices], EVAL-AD1896EB Datasheet - Page 25

• Manufacturer Part Number: EVAL-AD1896EB
• Description: AD1896 7.75:1 to 1:8, 192 kHz Stereo ASRC Evaluation Board
• Manufacturer: AD [Analog Devices]

EQUATIONS
// AD1896 ASRC Output Serial Port Interface Mode and word length Select
// CS8414 DIT Interface Mode Select.
format are
// set either RJ24, RJ20, RJ18 or RJ16.
LJ24, RJ24, RJ20,
// RJ18 and RJ16 mode to match the DIT interface requirment for DIT_SCLK.
// AD1852 Stereo DAC input serial Interface mode select.
programing for
// RJ20, RJ18, RJ16 mode.
registers,
// AD1852 will be configured in RJ24 mode when AD1896 output port is configured in RJ20, RJ18
and RJ16 mode.
// AD1896, DIR, DIT, AD1852 MCLK control logic.
AD1896 in/out ports,
// 33.8688MHz crystal frequency will be divided by either 1, 2 or 3 and the ouput of the di-
vider is feed into the DAC and DIT.
// On-board 12.288MHz clock oscillator is enabled only when input and ouput serial ports are
configured in SLAVE mode.
// IO control logic for bi-directional signals
// AD1896 ASRC Output Serial port signals
// DAC AND DIT SIGNALS
WDLNGTH_O_1 = WDLNGTH1;
WDLNGTH_O_0 = WDLNGTH0;
SMODE_O_1
SMODE_O_0
OSC_EN
SLVCLK1 = (O_MAS_768) # (BOTH_SLAVE);
SLVCLK0 = (O_MAS_512) # (BOTH_SLAVE);
DIV2_3
DDO_SCLK.OE
DDO_LRCLK.OE = (O_MAS_768 # O_MAS_512 # O_MAS_256);
SCLK_O.OE
LRCLK_O.OE
DDO_SDATA =
DDO_SCLK
DDO_LRCLK = ILRCLK;
SCLK_O
LRCLK_O
SDATA_DAC_DIT = SDATA_O;
LRCLK_DAC
M0 = LJ;
M1 = 0;
M2 = I2S;
IDPM1 = LJ;
IDPM0 = I2S;
= (BOTH_SLAVE);
= (!O_MAS_512) & (O_MAS_768);
= ISCLK;
= ISCLK;
= ILRCLK;
= OPMODE1;
= OPMODE0;
= (O_MAS_768 # O_MAS_512 # O_MAS_256);
= (BOTH_SLAVE # MATCH_PHASE # IN_MAS_768 # IN_MAS_512 # IN_MAS_256);
= (BOTH_SLAVE # MATCH_PHASE # IN_MAS_768 # IN_MAS_512 # IN_MAS_256);
SDATA_O;
= ILRCLK;
Since AD1896 EVB does not allow serial programming of the AD1852
The chip is configured in the LJ mode when AD1896 output
Also need to invert the incoming SCLK signal in the
Based on the Master/Slave operation of the
NOTE that the DAC requires serial
EVAL-AD1896EB