參數(shù)資料
型號: LM4931
廠商: National Semiconductor Corporation
英文描述: Audio Subsystem with Mono High Efficiency Loudspeaker and Stereo Headphone Amplifiers
中文描述: 與單聲道音頻子系統(tǒng)高效揚(yáng)聲器和立體聲耳機(jī)放大器
文件頁數(shù): 12/47頁
文件大小: 1640K
代理商: LM4931
System Control
The LM4931 is controlled via either a three wire SPI or a two wire I
2
C compatible interface, selectable with the MODE pin When
MODE is cleared the device is in I
2
C mode, when MODE is set the device is in SPI mode. This interface is used to configure the
operating mode, interfaces, data converters, mixers and amplifiers. The LM4931 is controlled by writing 8 bit data into a series
of write-only registers, the device is always a slave for both type of interfaces.
THREE WIRE, SPI INTERFACE (MODE = 1)
20100959
When the part is configured as an SPI device and the enable (ENB) line is lowered the serial data on SDI is clocked in on the
rising edge of the SCK line. The protocol used is 16bit, MSB first. The upper 8 bits (15:8) are used to select an address within
the device, the lower 8 bits (7:0) contain the updated data for this register.
TWO WIRE I
2
C COMPATIBLE INTERFACE (MODE = 0)
20100961
20100960
FIGURE 2.
20100962
FIGURE 3.
L
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