DSPIC33FJ256MC710-I/PF Microchip Technology Inc., DSPIC33FJ256MC710-I/PF Datasheet - Page 199
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DSPIC33FJ256MC710-I/PF
Manufacturer Part Number
DSPIC33FJ256MC710-I/PF
Description
16 BIT MCU/DSP 100LD 40MIPS 256KB FLASH
Manufacturer
Microchip Technology Inc.
Type
DSPr
Datasheet
1.DSPIC33FJ256MC710-IPF.pdf
(371 pages)
Specifications of DSPIC33FJ256MC710-I/PF
A/d Inputs
24-Channels, 12-Bit
Comparators
8
Cpu Speed
40 MIPS
Eeprom Memory
0 Bytes
Input Output
85
Interface
I2C/SPI/UART
Ios
85
Memory Type
Flash
Number Of Bits
16
Package Type
100-pin TQFP
Programmable Memory
256K Bytes
Ram Size
30K Bytes
Timers
9-16-bit, 4-32-bit
Voltage, Range
3-3.6
Lead Free Status / Rohs Status
RoHS Compliant part
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16.0
This section 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.
FIGURE 16-1:
© 2006 Microchip Technology Inc.
Note:
UPDN
INDX
QEA
QEB
QUADRATURE ENCODER
INTERFACE (QEI) MODULE
This data sheet summarizes the features
of this group of dsPIC33F devices. It is not
intended to be a comprehensive reference
source. To complement the information in
this data sheet, refer to the “dsPIC30F
Family Reference Manual” (DS70046).
Synchronize
Sleep Input
Det
PCDOUT
UPDN_SRC
QUADRATURE ENCODER INTERFACE BLOCK DIAGRAM
Programmable
0
Programmable
1
Programmable
1
0
Digital Filter
Digital Filter
Digital Filter
QEICON<11>
Existing Pin Logic
Up/Down
3
QEIM<2:0>
T
CY
Interface Logic
Quadrature
TQCS
Encoder
0
1
Mode Select
QEIM<2:0>
Preliminary
3
TQGATE
1
0
2
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
Figure 16-1 depicts the Quadrature Encoder Interface
block diagram.
index pulse
16-bit Up/Down Counter
Max Count Register
D
CK
Comparator/
Zero Detect
(MAXCNT)
(POSCNT)
TQCKPS<1:0>
Q
Q
1, 8, 64, 256
Prescaler
bits,
2
QEIM<2:0>
Reset
Equal
dsPIC33F
DS70165D-page 197
(QEICON<10:8>).
QEIIF
Event
Flag
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