DSPIC30F5015T-20I/PT Microchip Technology, DSPIC30F5015T-20I/PT Datasheet - Page 97

• Manufacturer Part Number: DSPIC30F5015T-20I/PT
• Description: IC DSPIC MCU/DSP 66K 64TQFP
• Manufacturer: Microchip Technology
• Series: dsPIC™ 30Fr

Specifications of DSPIC30F5015T-20I/PT

• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 20 MIPS
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, Motor Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 52
• Program Memory Size: 66KB (22K x 24)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• For Use With: AC30F008 - MODULE SKT FOR DSPIC30F 64TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14.0
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 motor positioning data. Incre-
mental encoders are very useful in motor control
applications.
FIGURE 14-1:
 2004 Microchip Technology Inc.
Note: This data sheet summarizes features of this group
of dsPIC30F devices and is not intended to be a complete
reference source. For more information on the CPU,
peripherals, register descriptions and general device
functionality, refer to the dsPIC30F Family Reference
Manual (DS70046).
UPDN
INDX
QEA
QEB
QUADRATURE ENCODER
INTERFACE (QEI) MODULE
Synchronize
Sleep Input
Det
PCDOUT
QUADRATURE ENCODER INTERFACE BLOCK DIAGRAM
UPDN_SRC
Programmable
Programmable
0
Programmable
1
0
1
Digital Filter
Digital Filter
Digital Filter
QEICON<11>
Existing Pin Logic
Up/Down
T
QEIM<2:0>
CY
Interface Logic
Quadrature
TQCS
Encoder
1
0
Mode Select
QEIM<2:0>
Preliminary
3
TQGATE
1
0
2
The Quadrature Encoder Interface (QEI) is a key fea-
ture requirement for several motor control applications,
such as Switched Reluctance (SR) and AC Induction
Motor (ACIM). The operational features of the QEI are,
but not limited to:
• 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> (QEICON<10:8>).
Figure 14-1 depicts the Quadrature Encoder Interface
block diagram.
index pulse
16-bit Up/Down Counter
Max Count Register
D
CK
Comparator/
Zero Detect
(POSCNT)
(MAXCNT)
TQCKPS<1:0>
Q
Q
1, 8, 64, 256
Prescaler
2
Reset
Equal
dsPIC30F
DS70082G-page 95
QEIIF
Event
Flag