SAMV71Q21 datasheet(32/41 Pages) MICROCHIP

Part #	SAMV71Q21

Description	SAM E70/S70/V70/V71 Family Silicon Errata and Data Sheet Clarification

PDF	41 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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32 / 41 page

19.

TWI High-Speed (TWIHS)

19.1

I2C Hold Timing Incompatibility

The TWIHS module is not compatible with I2C hold timing. The divider to program the hold time is too

short to achieve the expected hold time at high frequency. The achieved time is 227 ns maximum at 150

MHz, instead of the required 300 ns.

Workaround

None.

Affected Silicon Revisions

19.2

Clear Command

A bus reset using the CLEAR bit of the TWIHS Control register does not work correctly during a bus busy

state.

Workaround

Reconfigure the TWCK line in GPIO output and generate nine clock pulses through software to unlock

the I2C device.

Once this is done, the TWCK line can be reconfigured as a peripheral line.

Affected Silicon Revisions

SAM E70/S70/V70/V71 Family

TWI High-Speed (TWIHS)

Datasheet Errata

DS80000767C-page 32

SAMV71Q21 Datasheet(PDF) 32 Page - Microchip Technology