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STA309B Datasheet(PDF) 27 Page - STMicroelectronics

Part # STA309B
Description  Multichannel digital audio processor with FFX짰
PDF  66 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA309B Datasheet(HTML) 27 Page - STMicroelectronics

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STA309B
Registers
Doc ID 022570 Rev 2
27/66
7.2.4
Configuration register D (0x03)
The FFX power output mode selects how the FFX output timing is configured. Different
power devices use different output modes. The STA50x recommended use is
OM = 10.
Setting the MPC bit turns on special processing that corrects the STA50x power device at
high power. This mode should lower the THD+N of a full STA50x FFX system at maximum
power output and slightly below. This mode will only be operational at OM[1,0] = 01.
D7
D6
D5
D4
D3
D2
D1
D0
MPC
CSZ4
CSZ3
CSZ2
CSZ1
CSZ0
OM1
OM0
11
00
00
1
0
Bit
RW
RST
Name
Description
0RW
0
OM0
FFX power output mode: selects configuration of
FFX output
1RW
1
OM1
OM[1,0]
Output stage - mode
00
STA50x/STA51xB - drop compensation
01
Discrete output stage - tapered compensation
10
STA50x/STA51xB - full power mode
11
Variable drop compensation (CSZn bits)
Bit
RW
RST
Name
Description
2RW
0
CSZ0
Contra size register: when OM[1,0] = 11, this register
determines the size of the FFX compensating pulse
from 0 clock ticks to 31 clock periods.
3RW
0
CSZ1
4RW
0
CSZ2
5RW
0
CSZ3
6RW
1
CSZ4
CSZ[4:0]
Compensating pulse size
00000
0 clock period compensating pulse size
00001
1 clock period compensating pulse size
……
11111
31 clock period compensating pulse size
Bit
RW
RST
Name
Description
7RW
1
MPC
Max power correction: setting to 1 enables STA50x
correction for THD reduction near maximum power
output



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