ST7MC2 datasheet(166/308 Pages) STMICROELECTRONICS

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MOTOR CONTROLLER (Cont’d)

Note on using the 3 MCIx pins as standard

I/Os: When none of the MCIx pins are needed in

the application (for instance when driving an in-

duction motor in open loop), they can be used as

standard I/O ports, by configuring the Motor Con-

troller as follows: PCN=1, TES

≠0 and IS=11. This

disables the MCIx alternate functions and switch-

es off the phase comparator. The state of the MCIx

pins is summarized in Table 36.

Table 36. MCIx pin configuration summary

*When PCN=0, TES=0 SR=0, inputs in OFF-state are put in HiZ or grounded depending on the value of

the DISS bit in the MSCR register.

Notes:

1. Analog input: Based on analog comparator and analog voltage reference. The corresponding digital

I/O is disabled and data in the DR register is not representative of data on the input.

2. Digital input: Use of standard VIL, VIH I/O level. This input can also be read via the associated I/O port.

PCN TES SR IS[1:0]

MCIA

MCIB

MCIC

Input

Detection

Block Mode

Comments

Analog Input Hi-Z or GND Hi-Z or GND

Sensorless

All MCIx pins are reserved

for the MTC peripheral

Hi-Z or GND Analog Input Hi-Z or GND

Hi-Z or GND Hi-Z or GND Analog input

Analog Input Standard I/O Standard I/O

Position

Sensor

From 1 to 3 MCIx pins reserved

depending on sensor

Standard I/O Analog Input Standard I/O

Standard I/O Standard I/O Analog Input

Standard I/O Standard I/O Standard I/O

All MCIx pins are standard I/Os.

Phase comparator is OFF

≠0

Analog Input Standard I/O Standard I/O

Phase comparator is ON.

The IS[1:0] bits must not be modified

to avoid spurious event detection

in Motor Controller

Standard I/O Analog Input Standard I/O

Standard I/O Standard I/O Analog Input

Standard I/O Standard I/O Standard I/O

All MCIx pins are standard I/Os.

Recommended configuration:

phase comparator OFF

≠00 x

Digital Input Standard I/O Standard I/O

Speed Sensor

Tachogenerator

Phase comparator is OFF

Standard I/O Digital Input Standard I/O

Standard I/O Standard I/O Digital Input

Digital Input Digital Input Standard I/O

Speed Sensor

Encoder

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