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WICED Smart Bluetooth

Anonymous
Not applicable

* What is the maximum SPI frequency for SPIFFY2? The documentation is conflicting.

20732-DS107-R pg 35 specifies:

"12 MHz when:              VDDIO >= 2.2v

  6 MHz when:    2.2V > VDDIO >= 1.62v"

920732HW-AN100-R pg 7 specifies:

"The maximum SCLK speed supported by SPIFFY2 is 6 MHz at all IO supply voltages."

* Are the maximum frequencies different for master and slave mode?

* Is there a minimum SPI frequency?

* For a given SPI transmission size, will the device consume more energy with a high clock rate (6 MHz), or a low clock rate (100 KHz)

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Moderator
Moderator

While SPIFFY1 (SPI 1) can run at 12MHz, it shares the SCL+SDA with the I2C interface, which is connected internally to the 512K of EEROM inside the module.

SPIFFY2 (SPI 2) can be configured as either master or slave and supports a max speed of 6 MHz.

Both SPI interfaces support all four SPI modes and either endianness.

I'm not aware of a min clock rate on SPIFFY2.

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Moderator
Moderator

While SPIFFY1 (SPI 1) can run at 12MHz, it shares the SCL+SDA with the I2C interface, which is connected internally to the 512K of EEROM inside the module.

SPIFFY2 (SPI 2) can be configured as either master or slave and supports a max speed of 6 MHz.

Both SPI interfaces support all four SPI modes and either endianness.

I'm not aware of a min clock rate on SPIFFY2.

View solution in original post

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