DSPIC33FJ32MC202-I/MM Microchip Technology, DSPIC33FJ32MC202-I/MM Datasheet - Page 8

• Manufacturer Part Number: DSPIC33FJ32MC202-I/MM
• Description: IC DSPIC MCU/DSP 32K 28QFN
• Manufacturer: Microchip Technology
• Series: dsPIC™ 33Fr

Specifications of DSPIC33FJ32MC202-I/MM

• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 40 MIPs
• Connectivity: I²C, IrDA, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, Motor Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 21
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 6x10b/12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-QFN
• Core Frequency: 40MHz
• Core Supply Voltage: 2.75V
• Embedded Interface Type: I2C, JTAG, SPI, UART
• No. Of I/o's: 21
• Flash Memory Size: 32KB
• Supply Voltage Range: 3V To 3.6V
• Package: 28QFN-S EP
• Device Core: dsPIC
• Family Name: dSPIC33
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 3.3 V
• Data Bus Width: 16 Bit
• Number Of Programmable I/os: 21
• Interface Type: I2C/SPI/UART
• On-chip Adc: 6-chx10-bit|6-chx12-bit
• Number Of Timers: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC164336 - MODULE SOCKET FOR PM3 28/44QFNDV164033 - KIT START EXPLORER 16 MPLAB ICD2DM240001 - BOARD DEMO PIC24/DSPIC33/PIC32
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304
23. Module: QEI
EXAMPLE 1:
DS80463E-page 8
unsigned int POSCNT_b15 = 0;
unsigned int Motor_Position = 0;
int main(void)
{
}
void __attribute__((__interrupt__)) _QEIInterrupt(void)
{
}
The Quadrature Encoder Interface (QEI) module
does not generate an interrupt when MAXCNT is
set to 0xFFFF and the following events occur:
1. POSCNT underflows from 0x0000 to 0xFFFF.
2. POSCNT stops.
3. POSCNT overflows from 0xFFFF to 0x0000.
This sequence of events occurs when the motor is
running in one direction, which causes POSCNT to
underflow to 0xFFFF. Then, if the motor stops and
starts running in the opposite direction an overflow
from 0xFFFF to 0x0000 will be generated. The QEI
module does not generate an interrupt when this
condition occurs.
Work around
To prevent this condition from occurring, set
MAXCNT to 0x7FFF, which will cause an interrupt
to be generated by the QEI module.
In addition, a global variable could be used to keep
track of bit 15, so that when an overflow or
underflow condition is present on POSCNT, the
variable will toggle bit 15.
code required for this global variable.
Affected Silicon Revisions
A2
X
A3
X
// ... User's code
MAXCNT = 0x7FFF;
Motor_Position = POSCNT_b15 + POSCNT;
// ... User's code
IFSxbits.QEIIF = 0;
POSCNT_b15 ^= 0x8000; // Overflow or Underflow
A4
X
A5
X
A6
X
Example 1
// Instead of 0xFFFF
// Clear QEI interrupt flag
// x=2 for dsPIC30F
// x=3 for dsPIC33F
shows the
24. Module: PGEC3/PGED3 Programming
When using the PGEC3/PGED3 pins for device
programming, the programming time may be
slower as compared to other available PGECx/
PGEDx pin pairs, because the Enhanced In-Circuit
Serial Programming™ (ICSP™) algorithm cannot
be executed on this pin pair.
Refer
Programming
additional information on this limitation.
Work around
Use alternate PGECx/PGEDx programming pin
pairs.
Affected Silicon Revisions
A2
X
A3
X
to
Pins
A4
the
X
Specification”
© 2010 Microchip Technology Inc.
A5
X
“dsPIC33F/PIC24H
A6
X
(DS70152)
Flash
for