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NRF52810-QFAA-R Datasheet(PDF) 205 Page - Nordic Semiconductor |
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NRF52810-QFAA-R Datasheet(HTML) 205 Page - Nordic Semiconductor |
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205 / 483 page  Peripherals This configuration must be retained in the GPIO for the selected I/Os as long as the PDM module is supposed to be connected to an external PDM circuit. Only one peripheral can be assigned to drive a particular GPIO pin at a time. Failing to do so may result in unpredictable behaviour. PDM signal PDM pin Direction Output value Comment CLK As specified in PSEL.CLK Output 0 DIN As specified in PSEL.DIN Input Not applicable Table 43: GPIO configuration before enabling peripheral 6.10.7 Registers Base address Peripheral Instance Description Configuration 0x4001D000 PDM PDM Pulse-density modulation (digital microphone interface) Table 44: Instances Register Offset Description TASKS_START 0x000 Starts continuous PDM transfer TASKS_STOP 0x004 Stops PDM transfer EVENTS_STARTED 0x100 PDM transfer has started EVENTS_STOPPED 0x104 PDM transfer has finished EVENTS_END 0x108 The PDM has written the last sample specified by SAMPLE.MAXCNT (or the last sample after a STOP task has been received) to Data RAM INTEN 0x300 Enable or disable interrupt INTENSET 0x304 Enable interrupt INTENCLR 0x308 Disable interrupt ENABLE 0x500 PDM module enable register PDMCLKCTRL 0x504 PDM clock generator control MODE 0x508 Defines the routing of the connected PDM microphones' signals GAINL 0x518 Left output gain adjustment GAINR 0x51C Right output gain adjustment PSEL.CLK 0x540 Pin number configuration for PDM CLK signal PSEL.DIN 0x544 Pin number configuration for PDM DIN signal SAMPLE.PTR 0x560 RAM address pointer to write samples to with EasyDMA SAMPLE.MAXCNT 0x564 Number of samples to allocate memory for in EasyDMA mode Table 45: Register Overview 6.10.7.1 INTEN Address offset: 0x300 Enable or disable interrupt 4430_161 v1.0 205 |
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