AK7712 Asahi Kasei Microsystems, AK7712 Datasheet - Page 31

• Manufacturer Part Number: AK7712
• Description: Built-in 20-bit ADC/DAC Sophisticated Audio DSP
• Manufacturer: Asahi Kasei Microsystems

ASAHI KASEI
, (45
(45
In this way, upper 24 bits and lower 21 bits are calculated.
0180-E-02
16-bit) calculation is done with the data regulated as follows.
,OP,
,OP,
,OP,CR
,OP,CR
,OP,CR
,OP,
,OP,
,OP,
,PP,
16-bit) Calculation
DR ,
DR ,
DR ,IDR0=SDLF <<
,IDR1=BDRF + LDR1
,IDR0=SHR6 + LDR0
,
,
,IDR1=SH0 <<
This 34-bit data is shifted 15 bits to right and then is added to upper data.
,
<Example of Calculation Program(45
,CPU,DU1,,
,
,CPU,
,
,
,
,
,
,
,
,
,
,
,
,
,
- 31 -
,,
,,
,,
,,
,,
,,
,,ODRB, ;DR1: upper 24 bits data
,,
, ;Read of Coefficient(MSB), Data(MSB)
, ;
, ;Y
, ;Y
, ;
, ;
, ;ODRB: lower 24 bits data
, ;Y
16-bit)>
XH
XL(shifted 6bit to right)
XH,Read of Coefficient(LSB)
[AK7712A-VT]
1997/12