LC78856 查看數據表（PDF） - SANYO -> Panasonic
零件编号
产品描述 (功能)
比赛名单
LC78856 Datasheet PDF : 8 Pages
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LC78856M, 78856V
Pin Functions
SSOP
1
2
3
4
5
6
7
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
MFP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Symbol
RSTB
CNT1
CNT2
CNT3
BCLK
LRCK
DATA
MODE
CKO
XVDD
XIN
XOUT
XGND
DGND
MRO
TEST
AVDD4
OUTRA
AGND2
OUTRB
AVDD3
AVDD2
OUTLB
AGND1
OUTLA
AVDD1
MLO
DVDD
Operating Description
Function
Reset input (A low-level input resets the LSI internal circuits.)
Emphasis on/off switching input
Standard speed/double speed switching input
Soft mute input
Bit clock input
LR clock input
Digital audio data input
Input format setting
Clock output
Oscillator amplifier power supply
Oscillator amplifier input
Oscillator amplifier output
Oscillator amplifier ground
Digital system ground
Right channel mute signal output
Test pin (Must be tied low in normal operation.)
Analog system power supply
Right channel output A
Analog system ground
Right channel output B
Analog system power supply
Analog system power supply
Left channel output B
Analog system ground
Left channel output A
Analog system power supply
Left channel mute signal output
Digital system power supply
The LC78856M and LC78856V internal circuits can be roughly divided into the digital filter block and the 1-bit D/A
converter block.
[Digital Filter Block]
1. Standard Speed
The LC78856M and LC78856V implements 8× oversampling using three FIR filters: a 43rd-order filter, an 11th-
order filter, and a 3rd-order filter. A 1st-order IIR filter is used for de-emphasis.
2. Double Speed
Double-speed playback is used, for example, for dubbing CDs to audio tape at double speed. Here, the same
frequency is used for XIN, but BCLK, LRCK and DATA are input at twice the rates used in standard-speed
playback. After de-emphasis is applied with a 1st-order IIR filter, the signal is 4× oversampled using a 43rd-order
FIR filter and a 3rd-order FIR filter.
No. 5128-5/8
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