ST7MC2N6 查看數據表（PDF） - STMicroelectronics

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ST7MC2N6

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

STMicroelectronics 

ST7MC1xx/ST7MC2xx

OP-AMP MODULE (Cont’d)

10.7.5 Op-Amp Programming

The flowchart for Op-Amp operation is shown in

Figure 126

Figure 126. Normal Op-Amp Operation

Power On Reset

OACSR = 0000 0000

External components always connected

(1)

Write OACSR = x0010xx0

Wait for Amplifier to wake up (Twakeup)

(4)

Write OACSR = x0p1 pxx0

p : same as before

Yes

Compensation Offset ? No

Yes

No

Average Compensation ?

(2a)

Write OACSR = x111 0xx0

Wait for 24576*TCPU cycles

Read CMPOVR = 1

(2b)

Write OACSR = x101 0xx0

Wait for 1536*TCPU cycles

Read CMPOVR = 1

#OFFCMP & AVGCMP

should be set simultenaously

Need

closed loop gain > 20dB @ 100kHz ?

Yes

Yes

Re-compensate

Offset ?

No

Op-Amp useable

(3) #

Write OACSR = x1p1 1xx0

p : same as before

No

#The HIGHGAIN bit can also be written in step (1) or (2)

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