MA120 – ANGULAR SENSOR FOR BRUSHLESS MOTOR COMMUTATION

PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE

MA120 Rev. 1.2

www.MonolithicPower.com

9

7/25/2016

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Preliminary Specifications Subject to Change

© 2016 MPS. All Rights Reserved.

OPERATION

Timing of the Serial Interface

The data link is a 4-wire serial bus complying

with the serial peripheral interface (SPI) usual

convention (see Table 1 and Table 2). The

MagAlpha sensor operates as a slave. During

one transmission, a 16-bit word can be sent to

the sensor MOSI and received from the sensor

MISO simultaneously (see Figure 2).

Table 1: SPI Specification

SCLK idle state

High

SCLK readout edge

Rising

CS idle state

High

Data order

MSB first

Table 2: SPI Standard

CPOL

1

CPHA

1

MODE

3

DORD

0

Figure 2: SPI Timing Diagram

Table 3: SPI Timing

Parameter

Description

Min

Max

Unit

Time between two subsequent transmissions

50

ns

Time between CS falling edge and SCLK falling edge

50

ns

SCLK period

40

ns

Low level of SCLK signal

20

ns

High level of SCLK signal

20

ns

Time between SCLK rising edge and CS rising edge

25

ns

Data input valid to SCLK reading edge

15

ns

SCLK setting edge to data output valid

15

ns