AN857 查看數據表（PDF） - Microchip Technology
零件编号
产品描述 (功能)
生产厂家
AN857 Datasheet PDF : 48 Pages
| |||
AN857
TABLE 1:
CW SENSOR AND DRIVE BITS BY PHASE ORDER
Pin
RE2
RE1
RE0
RC5
RC4
RC3
RC2
RC1
RC0
Phase
Sensor Sensor Sensor
C
B
A
C High
Drive
C Low
Drive
B High
Drive
B Low
Drive
A High
Drive
A Low
Drive
1
1
0
1
0
0
0
1
1
0
2
1
0
0
1
0
0
1
0
0
3
1
1
0
1
0
0
0
0
1
4
0
1
0
0
0
1
0
0
1
5
0
1
1
0
1
1
0
0
0
6
0
0
1
0
1
0
0
1
0
Sorting Table 1 by sensor code binary weight results in Table 2. Activating the motor drivers, according to a state table
built from Table 2, will cause the motor of Figure 1 to rotate clockwise.
TABLE 2:
CW SENSOR AND DRIVE BITS BY SENSOR ORDER
Pin
RE2
RE1
RE0
RC5
RC4
RC3
RC2
RC1
RC0
Phase
Sensor Sensor Sensor
C
B
A
C High
Drive
C Low
Drive
B High
Drive
B Low
Drive
A High
Drive
A Low
Drive
6
0
0
1
0
1
0
0
1
0
4
0
1
0
0
0
1
0
0
1
5
0
1
1
0
1
1
0
0
0
2
1
0
0
1
0
0
1
0
0
1
1
0
1
0
0
0
1
1
0
3
1
1
0
1
0
0
0
0
1
Counter clockwise rotation is accomplished by driving current through the motor coils in the direction opposite of that
for clockwise rotation. Table 3 was constructed by swapping all the high and low drives of Table 2. Activating the motor
coils, according to a state table built from Table 3, will cause the motor to rotate counter clockwise. Phase numbers in
Table 3 are preceded by a slash denoting that the EMF is opposite that of the phases in Table 2.
TABLE 3:
CCW SENSOR AND DRIVE BITS
Pin
RE2
RE1
RE0
RC5
RC4
RC3
RC2
RC1
RC0
Phase
/6
/4
/5
/2
/1
/3
Sensor
C
0
0
0
1
1
1
Sensor
B
0
1
1
0
0
1
Sensor
A
1
0
1
0
1
0
C High
Drive
1
0
1
0
0
0
C Low
Drive
0
0
0
1
0
1
B High
Drive
0
0
0
1
1
0
B Low
Drive
0
1
1
0
0
0
A High
Drive
0
1
0
0
0
1
A Low
Drive
1
0
0
0
1
0
The code segment for determining the appropriate drive word from the sensor inputs is shown in Figure 4.
DS00857B-page 4
2002-2011 Microchip Technology Inc.
Share Link: 