AN93
Rev. 1.4
205
Reading the Si3000 control registers is a two-step process. First, the value of the desired Si3000 control register
must be loaded into the U72 register; then, the value of U72 can be read. For example, to read the value of Si3000
control register 5, use the following AT command sequence:
AT+FCLASS=8
AT+VLS=14
AT:U72,25xx
AT:R72
In the command, AT:U72,25xx, the "2" in the bits [15:12] causes the value from the Si3000 control register specified
in bits [11:8] to be read and stored in the lower byte of the U72 register. In this command, xx=don't care. The
command, AT:R72, reads the U72 register value, the lower byte of which is the current value of Si3000 control
register 5. See the U-Register section for additional information on the use of U72 and the AT command section for
additional information on writing and reading U-Registers.
Detailed register descriptions for Si3000 registers 5, 6, 7, and 9 are presented in tables 117, 118, 119, and 120,
respectively. Please see the Si3000 data sheet, available from Silicon Laboratories, for complete information.
Summary of Contents for Si2404
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Page 200: ...AN93 200 Rev 1 4 Figure 31 TAM Handset and Speakerphone Voice Paths ...
Page 201: ...AN93 Rev 1 4 201 Figure 32 Si3000 Codec Gain and Signal Selection Options ...
Page 290: ...AN93 290 Rev 1 4 Figure 57 256 Band Spectral Display Figure 58 2048 Band Spectral Display ...
Page 305: ...AN93 Rev 1 4 305 Figure 76 Parallel or SPI Port Interrupt Service Flowchart ...
