L9663 datasheet(83/106 Pages) STMICROELECTRONICS

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DS11401 Rev 6

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L9663

Communication interface

105

MISO

This output signal is used to transfer data serially out of the device. Data is shifted out on the

rising edge of Serial Clock (SCLK). MISO is in high impedance under POR condition.

5.2.2

Clock and data characteristics

A microcontroller with its SPI peripheral running in the following mode can drive the SPI:

CPOL = '0' and CPHA = '1'.

The communication frame starts with the falling edge of the CS (Communication Start).

SCLK has to be low.

The MOSI data are then latched on all following falling SCLK edges into the internal shift

registers.

After Communication Start, the MISO will leave tri-state and shift the MSB of the output data

on MISO. On all following rising SCLK edges data are shifted out through the internal shift

registers to MISO.

The communication frame is finished with the rising edge of CS. If a valid communication

took place (e.g. correct number of SCLK cycles), the operation requested will be performed

(Write or Clear operation).

L9663 bảng dữ liệu(PDF) 83 Page - STMicroelectronics