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AK2401 データシート(PDF) 79 Page - Asahi Kasei Microsystems |
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AK2401 データシート(HTML) 79 Page - Asahi Kasei Microsystems |
79 / 103 page [AK2401] 017003093-E-00 2017/3 79 15.13. <0x17~0x18>CAL START Address D7 D6 D5 D4 D3 D2 D1 D0 R/W 0x17 - - CAL LNAPD OFS2REG OFSCAL4 OFSCAL3 OFSCAL2 OFSCAL1 R/W Initial value 0 0 0 0 0 0 0x18 - - - - CHOFS_AVE[1:0] AGCOFS_AVE[1:0] R/W Initial value 0 0 0 0 Refer to “13.8.6. DC Offset Calibration” for detailed operation of DC offset calibration. CALLNAPD: LNA Power Down Setting for DC Offset Calibration of Analog Block (MIXER) This bit set ON/OFF of LNA power down function for initial DC offset calibration of the analog block. LNA is powered down during calibration by setting OFSCAL1 bit = “1” and powered up automatically after the calibration is finished. This setting is only valid when PD_LNA_N bit = “1” <Address 0x2E>. Normally, CALLNAPD bit should be set to “1”. 0: Do not power down the LNA during the DC offset calibration of the analog block (MIXER) 1: Power down the LNA during the DC offset calibration of the analog block (MIXER) OFS2REG: External Input Setting for DC Offset Compensation Value This bit selects DC offset compensation value source for the channel filter block. When it is “1”, setting value of I ch or Q ch <Address 0x19 ~ 0x1E> is used for offset compensation instead of using calibration result by OFSCAL2 bit. Normally, OFS3REF bit should be set to “0”. 0: Use Calibration Result for DC Offset Compensation for the Channel Filter 1: Use Register Settings for DC Offset Compensation for the Channel Filter OFSCAL4: Start Trigger of DC Offset Calibration for Digital (AGC) Block DC offset calibration for digital (AGC) block starts by writing “1” to this bit. This bit returns to “0” automatically after the calibration is finished. OFSCAL3: Start Trigger of DC Offset Calibration for Digital (Channel Filter) Block DC offset calibration for digital (Channel Filter) block starts by writing “1” to this bit. This bit returns to “0” automatically after the calibration is finished. OFSCAL2: Start Trigger of DC Offset Calibration for Digital (Channel Filter + AGC) Block DC offset calibration for digital (Channel Filter + AGC) block starts by writing “1” to this bit. This bit returns to “0” automatically after the calibration is finished. OFSCAL1: Start Trigger of DC Offset Calibration for Analog Block (MIXER) DC offset calibration for analog block (MIXER) starts by writing “1” to this bit. This bit returns to “0” automatically after the calibration is finished. CHOFS_AVE[1:0]: Averaging Time of Calibration for Digital (Channel Filter) Block Set the time of sampling data averaging process during the DC offset calibration of channel filter block. AGCOFS_AVE[1:0]: Averaging Time of Calibration for Digital (AGC) Block Set the time of sampling data averaging process during the DC offset calibration of AGC block. |
同様の部品番号 - AK2401 |
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同様の説明 - AK2401 |
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