CXD5602 User Manual
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306/1010
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PWM output
HPADC output
(Channel 0)
HPADC output
(Channel 1)
Data Enable
FIFO Write
Timing
Capture timing is
controllable
The number of
capture data is
controllable
Figure SCU (Sensor Control Unit)-85 ADC Data Capture Mode using the PWM Output Timing as a Reference
When setting the PWM channel n (n = 0, ..., 7), set the following registers in addition to the basic operation
settings.
PWM_PASExx register
PWM_CNTENn field[15:8] … sets the capture start position (3 to 255)
PWM_PASExx register
PWM_CNTENn field[7:4]… sets the number of captures (1 to 15)
PWMn_EN register
PWM_SELLn field [2:0] … selects the ADC channel used as the reference
PWM_SELLn field [5:3]
・・・
fixed to “0”
Enable control of this synchronization function is controlled by the PWMn_EN field of the PWMn_EN register
and synchronization operation starts by using the Writing to the PWMn_UPDATE register as a trigger.
The following is an example of the basic settings.
[1]Setting of the PWM to which data capture timing of the ADC is synchronized
HPADC0_D1 DECI_RATIO2 /HPADC1_D1 DECI_RATIO2/LPADC_D0
DECI_RATIO2/LPADC_D1 DECI_RATIO2/LPADC_D2 DECI_RATIO2/LPADC_D3 DECI_RATIO2
[2] Setting the number of data captured by the ADC
PWM_PASExx PWM_CNTENn [15:8] and [7:4] must not be “0”
[3]The Synchronization ADC is set
PWMn_EN PWM_SELLn Synchronization ADC channel setting
[4]The PWM starts
PWMxx_EN/PWMcxx_UPDATE is executed
The selection of which channel’s signal of the PWM to assign to each ADC channel is set by the registers on
Summary of Contents for CXD5602
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