LPO parameters:

•

Frequency: 32.768 KHz

•

Tolerance: +/- 150 ppm typical, +/- 250 maximum

•

Absolute maximum supplied voltage at LPO pin: +1.8 V

•

VIL min/max = 0 V/+0.5 V

•

VIH min/max = +1.47 V/+1.8 V

•

Input capacitance: 2.5 pF maximum

By default the 32 KHz is internally generated and is output on the LPO pin of the module. In order to enable the

use of external low power oscillator, the UseExtLPO variable has to be set to TRUE (refer to the Data Package

user manual for details), possibly at first power on of the board to avoid conflict in case external LPO output has

no enabling control. STM small footprint device M41T62LC6F can be used. Its LPO output can be disabled

through I2C interface.

6.6

MFi co-processor interface

A specific MFi co-processor is needed to enable iAP2 profile for connection with Apple devices. The MFi co-

processor component details are available for licensed MFi developers from the MFi program.

The MFi co-processor can be connected to the module through the I2C pins. External pull-up resistors are

needed on both lines.

The Data Package firmware handles the communication with the MFi co-processor.

SPBT3.0DP2

MFi co-processor interface

DS11599 - Rev 7

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