2015-03-06 10:26:02 +00:00
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## SAM D20 Peripherals usage
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| Type | Peripheral | Function | Notes
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|*GLCK*|
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2015-03-13 09:58:22 +00:00
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||gclk0|main clock, internal osc8m|4 MHz
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||gclk1|tcxo clock, fed from xosc
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2015-03-15 19:29:16 +00:00
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||gclk2|rtc feed, fed from gclk1. divide by 4096
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2015-03-13 09:58:22 +00:00
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2015-03-06 10:26:02 +00:00
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|*TC*||
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2015-03-15 19:29:16 +00:00
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||tc0|telemetry tick timer. 32-bit
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2015-03-13 09:58:22 +00:00
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||tc1|^^^^^
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||tc2|counts cycles of tcxo. 32-bit
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||tc3|^^^^^
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||tc4|osc8m event source
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2015-03-15 19:29:16 +00:00
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||tc5|telemetry pwm 8-bit
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2015-03-15 21:18:33 +00:00
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|*EXTINT*|
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||extint[5]|gps timepulse
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2015-03-13 09:58:22 +00:00
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|*event channels*|
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||0|event source for timer 2 xosc measurement
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||1|tc4 retrigger
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2015-03-06 10:26:02 +00:00
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|*SERCOM*||
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||sercom0|spi flash
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||sercom1|ublox gps
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||sercom2|
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||sercom3|radio|currently bitbanged as required pin layout broken in sercom
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2015-03-13 09:58:22 +00:00
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## SAM D20 Interrupts usage
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2015-03-15 19:29:16 +00:00
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| Name | Function | Priority H(0-3)L | Notes
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2015-03-13 09:58:22 +00:00
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| --- | --- | --- | ---
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2015-03-15 21:18:33 +00:00
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|TC0_IRQn|telemetry tick timer|0
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2015-03-15 19:29:16 +00:00
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|TC2_IRQn|xosc measurement done|2
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|[GPS_SERCOM]_IRQn|gps usart rx|0
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2015-03-15 21:18:33 +00:00
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|EIC_IRQn|timer|1
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