参数资料
型号: SM8521
厂商: Sharp Corporation
元件分类: DC/DC变换器
英文描述: 1 watt dc-dc converters
中文描述: 1瓦的DC - DC转换器
文件页数: 43/56页
文件大小: 267K
代理商: SM8521
SM8521
- 43 -
In order of Low and High, each 4-bit data is
specified. Each SG0 and SG1 waveform register
stores 4-bit x 32-step data as shown below.
Refer to SG0 and SG1 waveform registers in Fig.
9-3.
The most significant bit of each 4-bit data indicates
positive and negative.
That means, range of each 4-bit data is –8 to +7.
NOTE :
Waveform register read/write is possible only when SG is
disable.
7
0
STEP0
STEP2
STEP4
STEP6
STEP8
STEP10
STEP12
STEP14
STEP16
STEP18
STEP20
STEP22
STEP24
STEP26
STEP28
STEP30
STEP1
STEP3
STEP5
STEP7
STEP9
STEP11
STEP13
STEP15
STEP17
STEP19
STEP21
STEP23
STEP25
STEP27
STEP29
STEP31
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
3
4
Fig. 20 Sound Waveform Register
+2.5 V
+5.0 V
D/A output level
Time
Rump-up period
Rump-down period
Fig. 21 Example of D/A Output
NOTES :
Mute level of the D/A should be created by software.
Attenuate not to exceed capacity of D/A output level (0-5 V) by software.
To avoid pop-noise, make rump-up and down period by software.
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