LM49350RLX/NOPB National Semiconductor, LM49350RLX/NOPB Datasheet - Page 33

• Manufacturer Part Number: LM49350RLX/NOPB
• Description: IC AUDIO SUBSYSTM .8W D 36USMDXT
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class Dr

Specifications of LM49350RLX/NOPB

• Output Type: 1-Channel (Mono) with Mono and Stereo Headphones
• Max Output Power X Channels @ Load: 2W x 1 @ 4 Ohm; 69mW x 2 @ 32 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Features: 3D, DAC, Depop, I²C, I²S, Mute, Short-Circuit and Thermal Protection, Shutdown, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 36-MicroSMDxt
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM49350RLX

16.0 PMC Clocks Register
This register is used to control the LM49350's Basic Power Management Setup:
17.0 PMC Clock Divide Register
This register is used to control the LM49350's Power Management Circuits Clocks:
Bits
Bits
1:0
7:0
PMC_CLK_SEL
PMC_CLK_DIV
Field
Field
TABLE 4. PMC_SETUP (0x02h) (Default data value is 0x50h)
This selects the source of the PMC input clock.
This programs the half cycle divider that precedes the PMC. The PMC should run from a
300kHz clock. The default of this divider is 0x50h (divide by 40) to get a
from a 12MHz or 12.288MHz MCLK.
Program this divider with the division you want, multiplied by 2, and subtract 1.
TABLE 3. PMC_SETUP (0x01h)
PMC_CLK_SEL
PMC_CLK_DIV
00000000
00000001
00000010
00000011
00000100
00000101
11111101
11111110
11111111
00
01
10
11
—
33
Description
Description
MCLK (Default divide is 40)
Internal 300kHz Oscillator
PMC Input Clock Source
DAC SOURCE CLOCK
ADC SOURCE CLOCK
Divide by
127.5
126
128
1.5
2.5
—
1
1
2
3
≈
300kHz PMC clock
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