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參數(shù)資料
| 型號： | PIC30F2010 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | dsPIC High-Performance 16-bit Digital Signal Controller Family Overview |
| 中文描述： | dsPIC數(shù)字信號的高性能16位數(shù)字信號控制器系列簡介 |
| 文件頁數(shù)： | 23/34頁 |
| 文件大?。?/td> | 500K |
| 代理商： | PIC30F2010 |
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2001 Microchip Technology Inc.
Advance Information
DS70025D-page 23
dsPIC30F
6.5
QEI Module
The Quadrature Encoder Interface (QEI) module is
described below.
The module provides the Interface to incremental
encoders for obtaining motor positioning data. Incre-
mental encoders are very useful and specific to motor
control applications.
Figure 6-5 depicts a simplified block diagram of the QEI
Module.
FIGURE 6-5:
QUADRATURE ENCODER MODULE SIMPLIFIED BLOCK DIAGRAM
6.5.1
OVERVIEW
The Quadrature Encoder Interface (QEI) is a key fea-
ture requirement for several motor control applications,
such as Switched Reluctance (SR) motor and AC
Induction Motor (ACIM). The operational features of the
QEI are, but not limited to:
Three input channels for two phase signals and
index pulse
16-bit up/down position counter
Count direction status
Position measurement (x2 and x4) mode
Programmable digital noise filters on inputs
Alternate 16-bit timer/counter mode
Quadrature Encoder Interface interrupts
QUADRATURE
DECODER
LOGIC
UP/DOWN
16-BIT UP/DOWN
COUNTER
QEB/UPDN
QEA/T5CKI/
GATE
DIGITAL
FILTER
LOGIC
DIGITAL
FILTER
LOGIC
DIGITAL
FILTER
LOGIC
INDEX
CLOCK
DIR
CLOCK
DIVIDER
T
CY
PRESCALER AND
SYNC. LOGIC
1
0
TMR5CS
T
CY
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