ST7MC2 datasheet(226/308 Pages) STMICROELECTRONICS

Teilenummer	ST7MC2

Bauteilbeschribung	8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI

PDF	308 Pages

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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ST7MC1/ST7MC2

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MOTOR CONTROLLER (Cont’d)

MOTOR

SAMPLING

CLOCK

(MSCR)

Read/Write

Reset Value: 0000 0000 (00h)

Bit 7 = ZSV Z Event Sampling Validation when

MOE bit is reset

This bit enables/disables Z event sampling in ei-

ther mode (sampling at PWM frequency or at fSCF

frequency selected by SCF[1:0] bits)

0: Z event sampling disabled

1: Z event sampling enabled

Bits 6:4 = Reserved, must be kept cleared.

Bits 3:2 = SCF[1:0] Sampling Clock Frequency

These bits select the sampling clock frequency

(fSCF) used to count D & Z events.

Table 82. Sampling Clock Frequency

Note: Times are indicated for 4 MHz fPERIPH

Bit 1 = ECM: Encoder Capture Mode

This bit is used to select the source of events

which trigger the capture of the [MTIM:MTIML]

counter when using Encoder speed sensor (see

Figure 90).

0: Real Time Clock interrupts

1: Read access on MTIM register

Bit 0 = DISS Data Input Selection

This setting is effective only if PCN=0, TES=00

and SR=0.

0: Unused MCIx inputs are grounded

1: Unused MCIx inputs are put in HiZ

ZSV

SCF1

SCF0

ECM

DISS

SCF1

SCF0

fSCF

1 MHz (every 1µs)

500 kHz (every 2µs)

250 kHz (every 4µs)

125 kHz (every 8µs)

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