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Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller TQFP 100 (14x14) 8/16-Bit 32 MHz I/O number 78
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[Not recommended for new designs - Use XMEGA A1U series] XMEGA A1 [DATASHEET]
8067O–AVR–06/2013
It is possible to disable the TWI drivers in the device, and enable a four-wire digital interface for connecting to an external
TWI bus driver. This can be used for applications where the device operates from a different VCC voltage than used by
the TWI bus.
PORTC, PORTD, PORTE, and PORTF each has one TWI. Notation of these peripherals are TWIC, TWID, TWIE, and
TWIF.