參數(shù)資料
型號(hào)： LC78684E
廠商： Sanyo Electric Co.,Ltd.
英文描述： MP3 Decoder for Compact Disc Players
中文描述： MP3解碼器的光盤播放機(jī)
文件頁(yè)數(shù)： 15/21頁(yè)
文件大小： 287K
代理商： LC78684E
LC78684E
No.7350-15/21
MP3 Serial Data Input Timing
Fsck
T2
T3
STCK
STDAT
STREQ
(*Output from the LC78684E)
STCK
STDAT
T1h
T1l
Performing a serial data input operation requires that a serial input command be issued.
If this command has not been issued, the MP3 decoder will not operate, even if clock and data signals are applied to the STCK and
STDAT pins.
Ratings
typ
Parameter
Symbol
min
max
9.216
Unit
Transfer clock frequency
STCK H-level pulse width
STCK L-level pulse width
STDAT/STCK setup time
STDAT/STCK hold time
Fsck
T1h
T1l
T2
T3
MHz
ns
ns
ns
ns
45
45
30
30
: The table below lists the maximum frequencies for the transfer clock during serial input operations.
MODE
Fs (KHz)
Maximum serial transfer clock
frequency (MHz)
9.216
8.4672
6.144
4.608
4.2336
3.072
MPEG1
48
44.1
32
24 (12)
MPEG2
(MPEG2.5)
22.05 (11.025)
16 (8)
The transfer clock rate must be set to a speed less than or equal to the speed shown in the table so that the MP3 decoding
processing will complete in time.
Note that the table above applies when MP3DSET (register 41h, bit 0) is set to 1 (high-speed transfer mode).
The timings shown below apply when MP3DSET is set to 0 (low-speed transfer mode).
Ratings
typ
Parameter
Symbol
min
max
3.072
Unit
Transfer clock frequency
STCK H-level pulse width
STCK L-level pulse width
STDAT / STCK setup time
STDAT / STCK hold time
Fsck
T1h
T1l
T2
T3
MHz
ns
ns
ns
ns
150
150
125
125
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