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AS3701 Scheda tecnica(PDF) 50 Page - ams-OSRAM AG |
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AS3701 Scheda tecnica(HTML) 50 Page - ams-OSRAM AG |
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50 / 110 page  ams Datasheet Page 49 [v1-11] 2016-Dec-14 Document Feedback AS3701 − Detailed Description – System Functions PWM Output When selected, the GPIOx output provides the PWM signal generated by the internal programmable PWM generator. Its timing is defined by pwm_h_time [pwm_control_h], pwm_l_ time [pwm_control_l] and pwm_div [ReferenceControl]. The gpioX_mode [GPIOxcontrol] should be set to output. The gpioX_iosf [GPIOxcontrol] should be set to PWM output. For GPIO1 and GPIO2, the PWM output signal can be visualized via the Current sinks. In this case the gpioX_mode [GPIOxcontrol] should be set to CURRx. GPIO Interrupt Input A falling or rising edge will set the gpio_int bit. The gpioX_mode [GPIOxcontrol] should be set to input. The gpioX_iosf [GPIOxcontrol] should be set to GPIO Interrupt input. Current Sink PWM Input The GPIO is used as PWM input for the current sink to control the current. 100% PMW mode will set the current to the value set in currX_current [currX_value] register. The gpioX_mode [GPIOxcontrol] should be set to input. The gpioX_iosf [GPIOxcontrol] should be set to Current sink PWM input. Vselect Input As long as the GPIOx pin is low the DCDC/LDOs operate with the normal register settings. If the GPIOx pin goes high, the settings will change to the ones stored in RegX_voltage [RegX_ Voltage]. The gpioX_mode [GPIOxcontrol] should be set to input. The gpioX_iosf [GPIOxcontrol] should be set to vselect input. GPIO1 and GPIO2 may be used to control two regulators separately. Figure 56: GPIO Vselect Modes gpio1_ iosf gpio2_ iosf gpio3_ iosf gpio4_ iosf gpio5_ iosf Vselect Mode ≠5 ≠5 ≠5 ≠5 ≠5 No voltage select by GPIO for regulator 5 ≠5≠5≠5 ≠5 GPIO1 controls regulator selected by reg1_select and reg2_select ≠5 5 ≠5 ≠5 ≠5 GPIO2 controls regulator selected by reg1_select and reg2_select 5 5 ≠5 ≠5 ≠5 GPIO1 controls regulator selected by reg1_select GPIO2 controls regulator selected by reg2_select |
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