ST7MC2N6 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST7MC2N6

8-bit MCU with nested interrupts, Flash, 10-bit ADC, brushless motor control, five timers, SPI, LINSCI™

STMicroelectronics 

ST7MC1xx/ST7MC2xx

MOTOR CONTROLLER (Cont’d)

10.6.9 Channel Manager

The channel manager consists of:

– A Phase State register with preload and polarity

function

Figure 108. Channel Manager Block Diagram

– A multiplexer to direct the PWM to the low and/

or high channel group

– A tristate buffer asynchronously driven by an

emergency input

The block diagram is shown in Figure 108.

PWM Generator

Sampling frequency

Current comparator

output

MCFR Register

CFF[2:0] bits

MCRA Register

DAC bit

C

MPHST Register

OO bits*

MPAR Register

OE[5:0] bits

V

I

Filter

MCRA Register

V0C1 bit

PWM generator

V

SQ

I

OFF time

Sensorless Sensor

R

Sampling

“1”

Clock

6

Phasen Register*

6

Channel [5:0]

Notes:

Reg Updated/Shifted on R

Regn Updated with Regn+1 on C

I Current Mode

V Voltage Mode

events:

C Commutation

Z BEMF Zero-crossing

DS,H End Of Demagnetization

E Emergency Stop

R+/- Ratio Updated (+1 or -1)

O Multiplier Overflow

1 Branch taken after C event

2 Branch taken after D event

MCRA Register

SR bit

3 MCRB Register

OS[2:0] bits*

Dead

Time

Dead

Time

Dead

Time

8

MDTG Register

MREF Register

6

HFE[1:0] bits

HFRQ[2:0] bits

5

Channel [5:0]

2

High frequency chopper

MPOL Register

x6

OCV bit 1

OP[5:0] bits

6

MCRA Register

CLIM bit

1

CLI bit 1

MOE bit

1

x6

* = Preload register, changes taken into account at next C event.

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