參數(shù)資料
型號(hào)： YMU757B
元件分類： 音頻合成
英文描述： TONE/MUSIC SYNTHESIZER, PQCC20
封裝： QFN-20
文件頁(yè)數(shù)： 14/43頁(yè)
文件大?。?/td> 663K
代理商： YMU757B
YMU757B
-21-
Power-down control division diagram
As for the power-down, it is possible to divide an inside function separately and to control it.
The power-down is controlled by Index 38h.
Explanation of each bit
DP
It is the bit to make the power-down whole of the digital department.
Because clock to move inside stops consumption electric current of the digital part can be restrained in minimum.
Data on FIFO are cleared though contents of a register are held.
AP1
It is the bit that the power-down a VREF circuit decline.
If AP1 is set to “1”, the whole of the analog part stops. Because an analog center voltage is made by VREF circuit.
AP2
It is the bit to make power-down FM volume part, EQ circuit, speaker volume, and non-reversal amplifier side of
speaker output part.
SYNC
SDIN
SCLK
/RST
/IRQ
EQ1
VREF
Serial
I/F
DVDD
DVS
S
VOL
32step
P
ower
down
Con
trol
Register
RAM
FM
Synthesizer
4 sounds
generated
simultaneously
DAC
AMP
AVDD
A
V
SS
Timing Generator
HP
OUT
VOL
32step
FIFO
16b x 32w
EQ
EQ2
EQ3
SPOUT
VREF
Controlled by
using DP bit
Controlled by
using AP4 bit
Controlled by
using AP3 bit
Controlled by
using AP1 bit
Controlled by
using AP2 bit
VOL
32step
CLK_I
SPVSS
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