参数资料
型号: EVAL-AD1939AZ
厂商: Analog Devices Inc
文件页数: 25/32页
文件大小: 0K
描述: BOARD EVAL FOR AD1939
标准包装: 1
主要目的: 音频编解码器
已用 IC / 零件: AD1939
主要属性: 24 位,192 kHz,4 ADC: 107dB 动态范围,8 DAC: 112dB 动态范围
次要属性: 分时复用(TDM),SPI 接口
已供物品:
Evaluation Board User Guide
UG-040
//
M3_8414 = 0;
// CS8404 Tx interface mode select
APMS_TX = 0; // Tx serial port is always slave in this application
SFMT1_TX = 0;
SFMT0_TX = 1;
// Tx data format is I2S always
//
//
M0_8404 = 0;
M1_8404 = 0;
//
M2_8404 = 1;
// I2S format only
// divide 256Fs clock by 2 for 128Fs clock to the S/PDIF Tx
//
Qdivide.clk =
CPLD_MCLK;
//
//
Qdivide.d = !Qdivide;
MCLK_8406 = Qdivide;
MCLK_8406 = CPLD_MCLK;
BCLK_8406 = I_ABCLK;
LRCLK_8406 = I_ALRCLK;
SDATA_8406 = (ASDATA1 & S/PDIF_OUT_MUX) # (ASDATA2 & !S/PDIF_OUT_MUX);
// For SPI mode, let external port drive the SPI port
DBCLK.oe
= (DAC_S/PDIF
# DAC_HDR1 # DAC_ADC # !DAC_DAC) & (DAC_CLK_OFF);
DLRCLK.oe = (DAC_S/PDIF
# DAC_HDR1 # DAC_ADC # !DAC_DAC) & (DAC_CLK_OFF);
ABCLK.oe
= (ADC_S/PDIF
# ADC_HDR1 # !ADC_ADC # ADC_DAC) & (ADC_CLK_OFF);
ALRCLK.oe = (ADC_S/PDIF
# ADC_HDR1 # !ADC_ADC # ADC_DAC) & (ADC_CLK_OFF);
HDR1_DBCLK.oe
= (DAC_S/PDIF
# !DAC_HDR1 # DAC_ADC # DAC_DAC);
HDR1_DLRCLK.oe = (DAC_S/PDIF
# !DAC_HDR1 # DAC_ADC # DAC_DAC);
HDR1_ABCLK.oe
= (ADC_S/PDIF
# !ADC_HDR1 # ADC_ADC # ADC_DAC);
HDR1_ALRCLK.oe = (ADC_S/PDIF
# !ADC_HDR1 # ADC_ADC # ADC_DAC);
BCLK_8416.oe
= (!DAC_S/PDIF);
LRCLK_8416.oe = (!DAC_S/PDIF);
BCLK_8416
LRCLK_8416
DSDATA1.oe
= I_DBCLK;
= I_DLRCLK;
= (!DAC_DATA_HIZ);
DSDATA2.oe = (!(DAC_HDR1_TDM # DAC_DUAL_TDM # DAC_DATA_HIZ));
TDM-daisy chain mode
//DSDATA2 is output in DAC
DSDATA3.oe
= (!DAC_DATA_HIZ);
DSDATA4.oe = (!(DAC_DUAL_TDM # ADC_HDR_AUX # DAC_HDR1_AUX # DAC_DATA_HIZ));
TDM-OUT IN DUAL LINE DAC TDM MODE
// SECOND
ASDATA2.oe
= (ADC_HDR_TDM);
//ASDATA2 is input in ADC TDM mode
HDR1_DSDATA2.oe = (DAC_HDR1_TDM # DAC_DUAL_TDM);
Rev. 0 | Page 25 of 32
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