參數(shù)資料
型號： P95020ZLLGI8
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 電源管理
英文描述： 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA124
封裝： LLGA-124
文件頁數(shù)： 67/137頁
文件大?。?/td> 3533K
代理商： P95020ZLLGI8
P95020 / Preliminary Datasheet
Revision 0.7.10
35
2010 Integrated Device Technology, Inc.
2.13.6 AUDIO CLASS_D
– PWM Registers
This is a 32-bit register = {PWM3, PWM2, PWM1, PWM0}.
PWM3: IC Address = Page-2: 28(0x1C), C Address = 0xA21C
PWM2: IC Address = Page-2: 29(0x1D), C Address = 0xA21D
PWM1: IC Address = Page-2: 30(0x1E), C Address = 0xA21E
PWM0: IC Address = Page-2: 31(0x1F), C Address = 0xA21F
Bit
Bit Name
Default
Settings
User
Type
Value
Description / Comments
0
RESERVED
0b
RW
RESERVED
1
RESERVED
0b
RW
RESERVED
2
fourthorder
1b
RW
1 = 4th order binomial filter, 0 = 3rd order, noise improve of 6dB by
setting this bit to 0
3
RESERVED
0b
RW
RESERVED
4
roundup
1b
RW
1 = roundup, 0 = truncate for quantizer
5
clk320mode
1b
RW
1 = PCA clock mode, pclk = 2560*Fs, 0 = 2048*Fs
[7:6]
RESERVED
00b
RW
RESERVED
8
RESERVED
0b
RW
RESERVED
9
RESERVED
0b
RW
RESERVED
[14:10]
Dithpos
00000b
RW
Dither position
15
RESERVED
0b
RW
RESERVED
16
RESERVED
1b
RW
RESERVED
17
pwm_outflip
0b
RW
1 = swap pwm a/b output pair for all channels
[23:18]
dvalue
011000b
RW
dvalue constant field
[29:24]
cvalue
001010b
RW
tristate constant field, must be even and not 0
[31:30]
outctrl
00b
RW
pwm output muxing, 0 = normal, 1 = swap 0/1, 2 = ch0 on both, 3 =
ch1 on both
2.13.7 AUDIO CLASS_D
– LMTCTRL Register
Controls operation of the Volume Limiter (Compressor).
LMTCTRL: IC Address = Page-2: 32(0x20), C Address = 0xA220
Bit
Bit Name
Default
Settings
User
Type
Value
Description / Comments
0
limiter_en
0b
RW
1 = enable limiter (compressor)
[2:1]
stepsize
00b
RW
0 = 0.5 dB
1 = 1.0 dB
2 = 2.0 dB
3 = 4.0 dB
Gain stepsize when incrementing or decrementing:
3
zerocross
0b
RW
1 = only change limiter gain value on zero cross.
[7:4 ]
RESERVED
0000b
RW
RESERVED
2.13.8 AUDIO CLASS_D
– LMTATKTIME Register
Controls operation of the Volume Limiter (Compressor) Attack Time.
LMTATKTIME: IC Address = Page-2: 33(0x21), C Address = 0xA221
Bit
Bit Name
Default
Settings
User
Type
Value
Description / Comments
[6:0]
time
0000000b
RW
Timer value in units of 1 ms or 10 ms.
7
time10ms
0b
RW
0 = value in bits [6:0]
is in 1 ms units
1 = value in bits [6:0]
is in 10 ms units
1 = value in bits 6:0 is in 10ms units, otherwise 1ms units.
2.13.9 AUDIO CLASS_D
– LMTRELTIME Register
Controls operation of the Volume Limiter (Compressor) Release Time.
LMTRELTIME: IC Address = Page-2: 34(0x22), C Address = 0xA222
Bit
Bit Name
Default
Settings
User
Type
Value
Description / Comments
[6:0]
time
0000000b
RW
Timer value in units of 1 ms or 10 ms.
7
time10ms
0b
RW
0 = value in bits [6:0]
is in 1 ms units
1 = value in bits [6:0]
is in 10 ms units
1 = value in bits 6:0 is in 10ms units, otherwise 1ms units.
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