CS35L32 Datasheet, PDF (38/51 Pages) Cirrus Logic – Boosted Class D Amplifier with Speaker-Protection Monitoring and Flash LED Drivers

CS35L32
7.9 Battery Voltage Monitor
7.9 Battery Voltage Monitor
Address 0x0A
R/O
7
6
5
4
3
2
1
0
VPMON[7:0]
Default
0
0
0
0
0
0
0
0
Bits Name
Description
7:0 VPMON Battery voltage (VP) monitor. Represents the VPMON (D_OUT) value in the equation in Section 4.8.4.
1000 0000 –128
1111 1111 –1
0000 0001 +1
0111 1111 +127
1000 0001 –127… 0000 0000 0 (default)
0000 0010 +2 …
7.10 Boost Converter Peak Current Protection Control
R/W
7
6
5
4
3
2
BST_IPK[7:0]
Default
0
1
0
0
0
0
Address 0x0B
1
0
0
0
Bits Name
Description
7:0 BST_IPK Boost converter peak current limit (A). Configures the peak current limit on the boost converter’s output. If the amplifier or LEDs
attempt to draw current above this limit, only the set limit current is provided and, consequently, the boost voltage droops. The
user must not write values higher than 0x80 to this register.
0000 0000 2.89 …
0010 0000 3.30 …
0100 0000 (Default) 3.72 …
0110 0000 4.14 …
1000 0000 4.56
1000 0001–1111 1111 Reserved
7.11 Scaling
Address 0x0C
R/W
7
6
5
4
3
2
1
0
—
IMON_SCALE[3:0]
Default
0
0
0
0
0
1
1
1
Bits Name
Description
7:4 — Reserved
3:0 IMON_ Select IMON ADC scaling. Configures the scaling of data bits from the ADC to be output from the ADSP as the IMON data
SCALE word. The scale is selected from the encoded ADC output data bus with bit 22 being the ADC data MSB. Scaling control can
be used to improve the reported sample resolution for low-level signals or to divide down the signal.
0000 15 down to 0
…
0111 (Default) 22 down to 7 1001 24 down to 9
1000 23 down to 8
1010 25 down to 10
1011–1111 Reserved
Note: For 12-bit implementations, IMON_SCALE remains the same. The MSB is in the same place for 12- and 16-bit formats,
7.12 LED and Audio Power-Budget Management
R/W
7
6
5
4
3
2
—
ILED_MNG AUDIOGAIN_MNG
—
Default
0
0
0
0
0
0
Address 0x0D
1
0
VBOOST_MNG[1:0]
1
0
Bits Name
Description
7:5
—
Reserved
4 ILED_MNG LED current management
0 (Default) Automatically reduce LED current, only to avoid thermal shutdown or current limiting the boost converter.
1 User controls LED current (nonautomatic).
3 AUDIOGAIN_ Audio-gain management when LEDs are active.
MNG
0 (Default) Automatically reduces audio volume once by 3 dB, only if needed to avoid thermal shutdown or current
limiting the boost converter. If the condition persists, the CS35L32 examines ILED_MNG and responds accordingly.
Audio recovers to original volume automatically at the end of the LED event.
1 User controls audio volume (nonautomatic).
2
—
Reserved
1:0 VBOOST_ Boost voltage control.
MNG
00 Automatically managed. Boost-converter output voltage is the higher of the two: Class G or adaptive LED voltage.
01 Automatically managed irrespective of audio, adapting for low-power dissipation when LEDs are ON, and operating
in Fixed-Boost Bypass Mode if LEDs are OFF (VBST = VP).
10 (Default) Boost voltage fixed in Bypass Mode (VBST = VP).
11 Boost voltage fixed at 5 V.
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DS963F5