Advertisement
DP-7010
CIRCUIT DESCRIPTION
10. 8x over-sampling digital filter SM5813AP (X32-137X-XX : IC14)
DP-7010
CIRCUIT DESCRIPTION
10-5. Terminal connection diagram
10-6. Block diagram
10-1. Function
¢ 2-channel processing
© 8x over-sampling (interpolation) filter
(hereinafter referred to as 8fs for short)
® Serial input data
2's complement, MSB first
16-bit
© Serial output data
MSB first
2's complement/COB selectable
Selectable between 16-, 18- and 20-bit
® Jitter-free
Prevents any faulty operation due to the jitter of the
input clock signal, thus eliminating the jitter trans-
mission over to the output.
* System clock pulse
Selectable from 192fs, 256fs, 384fs and 512fs
* Crystal oscillation circuit incorporated
© I/O TTL compatible
¢ 5 V single power supply
© 28-pin plastic DIP
20
Attenuation
(dB)
10-2. Filter configuration
¢ Interpolation filter
Linear phase FIR filter 3-stage configuration
First stage (fs — 2fs), 153rd
Second stage (2fs — 4fs), 29th
Third stage (4fs — 8fs), 17th
© 22-bit filter coefficient, 20x22 bit parallel multiplier/25-
bit accumulator high-accuracy operation
¢ Overflow limiter incorporated
10-3. Applications
© CD playback
* DAT playback
© PCM playback
10-4. Filter characteristics
Characteristic item
Performance
Pass band
0 ~ 0.4535fs
Reject band
0.5465fs ~ 7.4535fs
Pass band ripple
Within £0.00005dB
Reject band attenuation
More than 110dB
Group delay time
Fixed
80
100
120
0.4535
0.5465
(24.1kHz)
{Xfs)
7.4535
(328.69kHz)
Fig. 10-1 Frequency response
36
DIN
BCKI
CKSi
cKOv
NC
XTi
xTO
Filter Operation
Circuit
Vss1
cKO
SYN
NC
NC
NC
RST
1
2
3
4
5
6
7
8
9
10-7. Explanation of terminls
"fs" occurring in the description means the sampling frequency of the input data.
[Pin No. | Pin Name
s
Function
Pare]
DIN
Input data.
pz
| een
Input data beat clock pulse.
3,4
CKSL, CKDV
XTI pin input frequency selection. (For details, refer to the description of XTI pin.)
[i 85:34
NC
-_|
Unused.
6
XTI
1 | Oscillator section input pin.
192 fs: CKSL = "H", CKDV = ""H"
256 fs : CKSL = '"H", CKDV = "'L"
384 fs : CKSL = "L", CKDV =""H"
512 fs : CKSL = "L", CKOV = "'L"'
us
XTO
O | Oscillator section output pin.
8
Vss1
oes GNOD1.
9
CKO
Oscillator section output clock pulse. (Frequency is the same as in XTI pin.)
10
SYN
|
Jitter-free mode/compulsory sync mode selection. (''H : Jitter-free mode, "'L'' : Compulsory sync mode)
11~13
NC
-_|
Unused.
14
RST
1 | System reset. (''H" : normal operation, ''L"' : system reset)
18
CoB
1 | 2's complement/COB selection. (""H" : 2's complement, "L" : COB)
!
16,17
| OW20,
OW18
Numberot oulpubots selection.
[ve
otosoursis
[16 [18 [30
| _fs-period internal operation timing clock pulse.
Input data sampling rate (fs) clock pulse. ("H' : Leh, ""L" : Bch}
18,19
NC
= | Unused.
|
20
OG
O | Deglitch control clock pulse.
21
Vss2
- | GND2.
22
Voo
— | Power supply (+5V).
23
DOR
O | Rech 8x over-sampling output data.
24
DOL
O | Lch 8x over-sampling output data.
25
WCKO
{ O | Output data word clock pulse.
26
{
BCKO
O | Output data bit clock pulse.
27
FSCO
ie)
!
28
LRCI
37
Advertisement
