DSPIC33FJ64GS406 Microchip Technology Inc., DSPIC33FJ64GS406 Datasheet - Page 255
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DSPIC33FJ64GS406
Manufacturer Part Number
DSPIC33FJ64GS406
Description
High-performance, 16-bit Digital Signal Controllers
Manufacturer
Microchip Technology Inc.
Datasheet
1.DSPIC33FJ64GS406.pdf
(418 pages)
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17.0
FIGURE 17-1:
2010 Microchip Technology Inc.
dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610
Note 1: This data sheet summarizes the features
INDXx
QEAx
QEBx
UPDNx
2: Some registers and associated bits
QUADRATURE ENCODER
INTERFACE (QEI) MODULE
(1)
(1)
(1)
Synchronize
of the dsPIC33FJ32GS406/606/608/610
and
families of devices. It is not intended to be
a comprehensive reference source. To
complement the information in this data
sheet, refer to Section 15. “Quadrature
Encoder Interface (QEI)” (DS70208) in
the “dsPIC33F/PIC24H Family Reference
Manual”, which is available from the
Microchip web site (www.microchip.com).
described in this section may not be avail-
able on all devices. Refer to Section 4.0
“Memory Organization” in this data
sheet for device-specific register and bit
information.
Sleep Input
Det
dsPIC33FJ64GS406/606/608/610
PCDOUT
UPDN_SRC
QUADRATURE ENCODER INTERFACE BLOCK DIAGRAM (x = 1 OR 2)
Programmable
Programmable
0
1
Programmable
0
1
Digital Filter
Digital Filter
Digital Filter
QEIxCON<11>
Existing Pin Logic
Up/Down
QEIM<2:0>
3
T
CY
Interface Logic
Quadrature
TQCS
Encoder
1
0
Mode Select
QEIM<2:0>
Note 1: The QEI1 module can be connected to the QEA1/QEB1/INDX1
Preliminary
3
TQGATE
or AQEA1/AQEB1/AINDX1 pins, which are controlled by clearing
or setting the ALTQIO bit in the FPOR Configuration register. See
Section 24.0 “Special Features” for more information.
1
0
2
This chapter describes the Quadrature Encoder Inter-
face (QEI) module and associated operational modes.
The QEI module provides the interface to incremental
encoders for obtaining mechanical position data.
The operational features of the QEI include:
• Three input channels for two phase signals and
• 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
These operating modes are determined by setting the
appropriate bits, QEIM<2:0> in (QEIxCON<10:8>).
Figure 17-1 depicts the Quadrature Encoder Interface
block diagram.
index pulse
Note:
16-bit Up/Down Counter
Max Count Register
D
CK
Comparator/
(POSxCNT)
(MAXxCNT)
Zero Detect
An ‘x’ used in the names of pins, control/
status bits and registers denotes a
particular Quadrature Encoder Interface
(QEI) module number (x = 1 or 2).
TQCKPS<1:0>
Q
Q
1, 8, 64, 256
Prescaler
2
Reset
Equal
DS70591C-page 255
QExIF
Event
Flag
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