ST7MC2S4-Auto datasheet(272/371 Pages) STMICROELECTRONICS

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Caution:

As the MPHST register contains bits with preload, the whole register has to be written at

once. This means that a bit set or bit reset instruction on only one bit without preload resets

all the bits with preload.

Motor current feedback register (MCFR)

5:0 OO[5:0]

Channel ON/OFF bits

These bits are used to switch channels ON/OFF at the next C event if the DAC

bit = 0 or if DAC directly = 1.

0: Channel OFF (output channel state inactive), the relevant switch is OFF, no PWM

possible

1: Channel ON (output channel state active), the relevant switch is ON, PWM is

possible (not significant when PCN or DTE bit is set)

Table 137.

MPHST register description (continued)

Bit

Name

Function

MCFR

Reset value: 0000 0000 (00h)

654

RPGS

RST

CFF[2:0]

CFW[2:0]

R/W

Table 138.

MCFR register description

Bit

Name

Function

RPGS

0: Access to registers mapped in page 0

1: Access to registers mapped in page 1

6RST

Reset MTC registers

Software can set this bit to reset all MTC registers without resetting the ST7.

0: No MTC register reset

1: Reset all MTC registers

5:3 CFF[2:0]

Current feedback filter bits

These bits select the number of consecutive valid samples (when the current is

above the limit) needed to generate the active event(1):

000: current feedback samples = 1

001: current feedback samples = 2

010: current feedback samples = 3

011: current feedback samples = 4

100: current feedback samples = 5

101: current feedback samples = 6

110: current feedback samples = 7

111: current feedback samples = 8

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