sx1441 Semtech Corporation, sx1441 Datasheet - Page 62

• Manufacturer Part Number: sx1441
• Description: Bluetooth V1.2 Soc For Voice And Data Applications With Dsp Capabilities
• Manufacturer: Semtech Corporation

Personal Area Network
3.14 AUDIO CODEC
3.14.1 Features
3.14.2 Register Map
Please note that the register map is split in 2 address ranges. The range 0x00E0-0x00FF maintains compatibility
with SX1441, while the register in the range 0x0064-0x0067 is associated new functionality introduced into the
SX1441 device (speaker and microphone volume control).
© Semtech 2006
Name
RegVolCtrl
RegVolCmdADC
RegVolCmdDAC
* reserved
RegCodecCtrl
* reserved
RegDACSampleH
RegDACSampleL
RegADCSampleH
RegADCSampleL
RegDmaRdStartAddrH
RegDmaRdStartAddrL
RegDmaRdStopAddrH
RegDmaRdStopAddrL
RegDmaWrStartAddrH
RegDmaWrStartAddrL
RegDmaWrStopAddrH
RegDmaWrStopAddrL
RegDmaCtrl
RegCodecDataFlow
* reserved
RegADCGain
* reserved
RegCodecPaMute
* reserved
Pos
7-3
2
1
0
• On-chip 16-bit audio linear codec, 8 kHz sampling rate, fully compliant with Bluetooth revision 1.2
• Internal voltage references to reduce external components count
• Single-ended or differential microphone input
• Class D DAC output stage with simple passive filter
• Integrated ADC preamplifier with configurable gain to adapt for various microphones
• Connected directly to the Bluetooth Sequencer
• Audio samples available to the host processor through direct memory access (DMA)
specifications
RegVolCtrl
-
VolCtrlDACMute
VolCtrlADCMute
VolCtrlEn
r/w
r
rw
rw
rw
Table 108 - RegVolCtrl register
Table 107 - Codec registers
Reset
00000
0
0
0
62
Address (Hex)
0x0064
0x0065
0x0066
0x0067
0x00E0
0x00E1
0x00E2
0x00E3
0x00E4
0x00E5
0x00E6
0x00E7
0x00E8
0x00E9
0x00EA
0x00EB
0x00EC
0x00ED
0x00EE
0x00EF
0x00F0
0x00F1
0x00F2-0x00F8
0x00F9
0x00FF
Function
unused
1 = Mute DAC output
0 = default DAC gain
1 = Mute ADC output
0 = default ADC gain
1 = enable volume control
0 = bypass volume control circuitry
SX1441 – Bluetooth® 1.2 SoC
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Data Sheet