DSPIC30F3010-20I/SP Microchip Technology, DSPIC30F3010-20I/SP Datasheet - Page 8

• Manufacturer Part Number: DSPIC30F3010-20I/SP
• Description: IC DSPIC MCU/DSP 24K 28DIP
• Manufacturer: Microchip Technology
• Series: dsPIC™ 30Fr

Specifications of DSPIC30F3010-20I/SP

• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 20 MIPS
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, Motor Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 24KB (8K x 24)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Core Frequency: 40MHz
• Core Supply Voltage: 5.5V
• Embedded Interface Type: I2C, SPI, UART
• No. Of I/o's: 20
• Flash Memory Size: 24KB
• Supply Voltage Range: 2.5V To 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: DSPIC30F301020ISP

dsPIC30F3010/3011
11. Module: Quadrature Encoder Interface
DS80216K-page 8
The Index Pulse Reset mode of the QEI does not
work properly when used along with count error
detection. When counting upwards, the POSCNT
register will increment one extra count after the
index pulse is received. The extra count will
generate a false count error interrupt.
Work around
There are multiple ways to work around this issue,
depending on the specific requirements of the
application:
1. Ignore count error interrupts when the counting
2. The user may disable count error interrupts by
3. The user may disable the index pulse reset
direction is upwards and the POSCNT register
has the value of MAXCNT + 1.
setting the CEID bit in the DFLTCON register.
feature by clearing the POSRES bit (QEI-
CON<2>). Writing QEICON = 0x0600 will pro-
vide a QEI interrupt each time an index pulse
is received, but the POSCNT register will not
be modified. The POSCNT register value can
be read in the QEI interrupt handler and used
as an offset value to calculate the absolute
position of the encoder disc with respect to the
index pulse.
12. Module: INT0, ADC and Sleep Mode
13. Module: 8x PLL Mode
ADC event triggers from the INT0 pin will not
wake-up the device from Sleep mode if the SMPI
bits are non-zero. This means that if the ADC is
configured to generate an interrupt after a certain
number of INT0 triggered conversions, the ADC
conversions will not be triggered and the device
will remain in Sleep. The ADC will perform
conversions and wake-up the device only if it is
configured to generate an interrupt after each INT0
triggered conversion (SMPI<3:0> = 0000).
Work around
None. If ADC event trigger from the INT0 pin is
required, initialize SMPI<3:0> to ‘0000’ (interrupt
on every conversion).
If 8x PLL mode is used, the input frequency range
is 5 MHz-10 MHz instead of 4 MHz-10 MHz.
Work around
None. If 8x PLL is used, make sure the input
crystal or clock frequency is 5 MHz or greater.
© 2008 Microchip Technology Inc.