ST7MC1 datasheet(222/308 Pages) STMICROELECTRONICS

222 / 308 page

ST7MC1/ST7MC2

222/308

MOTOR CONTROLLER (Cont’d)

PWM REGISTER (MPWME)

Read/Write

Reset Value: 0000 0000 (00h)

Bit 7 = DG:Debug Option.

This bit is used to enter debug mode. As a result,

C, D and Z events are output on 2 pins MCDEM

and MCZEM in Switched and Autoswitched mode,

C and U events are output in Speed Measurement

mode. Refer to section10.6.7.3 on page 171 for

more details

0: Normal mode

1: Debug mode

Bit 6 = PWMW: PWM W output control

0: PWM on Compare Register W is not output on

MCPWMW pin

1: PWM on Compare Register W is output on

MCPWMW pin

Bit 5 = PWMV: PWM V output control

0: PWM on Compare Register V is not output on

MCPWMV pin

1: PWM on Compare Register V is output on MCP-

WMV pin

Bit 4 = PWMU: PWM U output control

0: PWM on Compare Register U is not output on

MCPWMU pin

1: PWM on Compare Register U is output on

MCPWMU pin

Bits 3:0 = OT[3:0]: Off Time selection

These bits are used to select the OFF time in sen-

sorless current mode as shown in the following ta-

ble.

Table 76. OFF time bits

Note: Times are indicated for 4 MHz fPERIPH

PWMW PWMV PWMU

OT3

OT2

OT1

OT0

OT3 OT2 OT1 OT0

Off Time sen-

sorless mode

(SR=0)

(DS[3:0]=0)

Sensor Mode

(SR=1) or sam-

pling during ON

ime in sensor-

less (SPLG =1

and/or DS [3:0]

bits)

2.5 µs

No minimum off -

time

5 µs

7.5 µs

10 µs

12.5 µs

15 µs

17.5 µs

20 µs

22.5 µs

25 µs

27.5 µs

30 µs

32.5

µs

101

µs

37.5

µs

111

µs

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