LM49450SQ/NOPB National Semiconductor, LM49450SQ/NOPB Datasheet - Page 30

• Manufacturer Part Number: LM49450SQ/NOPB
• Description: IC AUDIO SUBSYSTEM 2.5W D 32LLP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class Dr

Specifications of LM49450SQ/NOPB

• Output Type: 2-Channel (Stereo) with Stereo Headphones
• Max Output Power X Channels @ Load: 2.5W x 2 @ 4 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: 32-LLP
• Amplifier Class: D
• No. Of Channels: 2
• Output Power: 1.2W
• Supply Voltage Range: 2.7V To 5.5V
• Load Impedance: 8ohm
• Operating Temperature Range: -40°C To +85°C
• Amplifier Case Style: LLP
• Rohs Compliant: Yes
• For Use With: LM49450SQEVAL - BOARD EVAL FOR LM49450
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM49450SQ; LM49450SQ; LM49450SQTR

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I2S CLOCK REGISTER (0x04h)
Default value is 0x00h.
B7:B4
B3:B2
Bit
B1
B0
B1:B0
Bit
B2
I2S_CLK_3
I2S_CLK_2
I2S_CLK_1
I2S_CLK_0
I2S_WS_M
I2S_WS_1
I2S_WS_0
I2S_CLK_
Name
(B7)
(B6)
(B5)
(B4)
(B3)
(B2)
MS
I2S_MODE_1 (B1)
I2S_MODE_0 (B0)
I2S_WORD_ORD
S
Name
ER
B7
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
B3
0
0
1
1
B6
0
0
0
1
0
0
1
1
0
0
0
0
1
1
1
1
Value
B1
0
0
1
1
0
1
0
1
B5
0
0
1
1
0
1
0
1
0
0
1
1
0
0
1
1
TABLE 13. I2S Clock Register
B2
0
1
0
1
Value
0
1
B4
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
B0
30
Sets divider ratio to derive the I
I
Determines the bit length per data word of I
mode
I
the I2S_WS line.
I
I2S_WS line is driven by the LM49450
I
I2S_CLK line.
I
signal. I2S_CLK line is driven by the LM49450.
0
1
0
1
2
2
2
2
2
S master mode
S WS slave mode. The LM49450 drives the I
S WS master mode. The LM49450 generates the I2S WS signal.
S clock slave mode. The LM49450 derives its I
S clock master mode. The LM49450 generates the I
DIVIDE BY
3.90625
7.8125
2.5
10
16
20
—
—
—
1
2
4
6
8
3
5
Normal mode.
I
I
Reverse mode.
I
I
Sets I
Normal Mode
Left Justified Mode
Right Justified Mode
Unused
2
2
2
2
S_WS = 0 indicates left channel audio
S_WS = 1 indicates right channel audio
S_WS = 0 indicates right channel audio
S_WS = 1 indicates left channel audio.
2
S operating mode
Description
2
16
25
32
—
S clock from the divided MCLK in
Description
2
S_WS in I
RATIO
32:125
16:125
2
2.5
1:3
1:5
S WS signal from
—
—
—
—
—
—
—
—
—
—
—
2
S clock from the
2
2
S clock
S master