Texas Instruments DEM-DAI3010 manual ADC Full-Scale Input Connector No Details, Emflg

Setting Functions

JP001 setting table: DIR1703 system clock and crystal frequency

fS in X’tal
Mode	128 fS	256 fS	384 fS	512 fS	BRSEL Jumper Position
32 kHz	4.096 MHz	8.192 MHz	12.288 MHz	16.384 MHz	BFRAME
44.1 kHz	5.6448 MHz	11.2896 MHz	16.9344 MHz	22.5792 MHz	EMFLG
48 kHz	6.144 MHz	12.288 MHz	18.432 MHz	24.576 MHz	OPEN (no jumper)
88.2 kHz	11.2896 MHz	22.5792 MHz	33.8688 MHz	45.1584 MHz	URBIT
96 kHz	12.288 MHz	24.576 MHz	36.864 MHz	49.152 MHz	CSBIT

Sample of a of JP001 setting

Target: system clock: 256 fS and fS = 48 kHz in the X’tal mode

In the preceding table, the frequency listed where the 256-fScolumn intersects the 48-kHz row is 12.288 MHz.

JP101–JP104: Cutoff frequency setting of DAC output post-LPF

The cutoff frequency of the LPF inserted in the DAC output is chosen by these jumpers. The initial setting (all pins shorted) is 54 kHz at the time of shipment. The cutoff frequency with all JP101–JP104 jumper pins open is 108 kHz.

JP105–JP106: Selection of ADC input connectors (CN101 and CN102 or CN103 and CN104)

There are two pairs of ADC input connectors. One pair is coupled to the PCM3010 through capacitors (C121, C122). The other pair is connected through a 103-kHz cutoff LPF and a –6 dB amplifier.

The input connectors are chosen by JP105 and JP106. When the jumpers are on Direct-IN, then the left- and right-channel inputs on CN103 and CN104, respectively, bypass the LPF.

When the jumpers are on –6 db/LPF, then the left- and right-channel inputs on CN101 and CN102, respectively, go through the LPF to the PCM3010.

ADC Full-Scale Input	Connector No.	Details
L-ch 2 V rms	CN101	L-ch ADC input with LPF
R-ch 2 V rms	CN102	R-ch ADC input with LPF
L-ch 1 V rms	CN103	L-ch ADC input without LPF
R-ch 1 V rms	CN104	R-ch ADC input without LPF

JP107: Connection of PCM3010 and S/PDIF I/O circuits

This is the header pin which connects the clock input and data I/O of the PCM3010 with an S/PDIF I/O circuit. All pin positions have shorting plugs installed at the time of shipment.

For evaluating the PCM3010 with other DSPs, DIRs, and DITs, JP107 jumpers are removed. Connection to the alternative devices is made through the row of JP107 pins that is wired to the PCM3010.

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