DSPIC30F5015-20I/PT Microchip Technology, DSPIC30F5015-20I/PT Datasheet - Page 82

• Manufacturer Part Number: DSPIC30F5015-20I/PT
• Description: Digital Signal Processor
• Manufacturer: Microchip Technology
• Series: dsPIC™ 30Fr

Specifications of DSPIC30F5015-20I/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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC30F008 - MODULE SKT FOR DSPIC30F 64TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: DSPIC30F501520IPT

dsPIC30F5015/5016
12.1.2
Each capture channel has an associated FIFO buffer,
which is four 16-bit words deep. There are two status
flags, which provide status on the FIFO buffer:
• ICBFNE – Input Capture Buffer Not Empty
• ICOV – Input Capture Overflow
The ICBFNE will be set on the first input capture event
and remain set until all capture events have been read
from the FIFO. As each word is read from the FIFO, the
remaining words are advanced by one position within
the buffer.
In the event that the FIFO is full with four capture
events and a fifth capture event occurs prior to a read
of the FIFO, an overflow condition will occur and the
ICOV bit will be set to a logic ‘1’. The fifth capture event
is lost and is not stored in the FIFO. No additional
events will be captured till all four events have been
read from the buffer.
If a FIFO read is performed after the last read and no
new capture event has been received, the read will
yield indeterminate results.
12.1.3
Each capture channel can select between one of two
timers for the time base, Timer2 or Timer3.
Selection of the timer resource is accomplished
through SFR bit ICTMR (ICxCON<7>). Timer3 is the
default timer resource available for the input capture
module.
12.1.4
When the input capture module is set for capture on
every edge, rising and falling, ICM<2:0> = 001, the
following operations are performed by the input
capture logic:
• The input capture interrupt flag is set on every
• The interrupt on Capture mode setting bits,
• A capture overflow condition is not generated in
DS70149D-page 82
edge, rising and falling
ICI<1:0>, is ignored, since every capture
generates an interrupt
this mode
CAPTURE BUFFER OPERATION
TIMER2 AND TIMER3 SELECTION
MODE
HALL SENSOR MODE
12.2
An input capture event will generate a device wake-up
or interrupt, if enabled, if the device is in CPU Idle or
Sleep mode.
Independent of the timer being enabled, the input
capture module will wake-up from the CPU Sleep or
Idle
ICM<2:0> = 111 and the interrupt enable bit is
asserted. The same wake-up can generate an
interrupt if the conditions for processing the interrupt
have been satisfied. The wake-up feature is useful as
a method of adding extra external pin interrupts.
12.2.1
CPU Sleep mode allows input capture module
opera tion with reduced functionality. In the CPU Sleep
mode, the ICI<1:0> bits are not applicable, and the
input capture module can only function as an external
interrupt source.
The capture module must be configured for interrupt
only on the rising edge (ICM<2:0> = 111) in order for
the input capture module to be used while the device
is in Sleep mode. The prescale settings of 4:1 or 16:1
are not applicable in this mode.
12.2.2
CPU Idle mode allows input capture module operation
with full functionality. In the CPU Idle mode, the Interrupt
mode selected by the ICI<1:0> bits is applicable, as well
as the 4:1 and 16:1 capture prescale settings, which are
defined by control bits ICM<2:0>. This mode requires
the selected timer to be enabled. Moreover, the ICSIDL
bit must be asserted to a logic ‘0’.
If
ICM<2:0> = 111 in CPU Idle mode, the input capture
pin will serve only as an external interrupt pin.
12.3
The input capture channels have the ability to generate
an interrupt, based upon the selected number of
capture events. The selection number is set by control
bits ICI<1:0> (ICxCON<6:5>).
Each channel provides an interrupt flag (ICxIF) bit. The
respective capture channel interrupt flag is located in
the corresponding IFSx Status register.
Enabling an interrupt is accomplished via the
respective Capture Channel Interrupt Enable (ICxIE)
bit. The Capture Interrupt Enable bit is located in the
corresponding IEC Control register.
the
mode
Input Capture Operation During
Sleep and Idle Modes
Input Capture Interrupts
input
INPUT CAPTURE IN CPU SLEEP
MODE
INPUT CAPTURE IN CPU IDLE
MODE
when
capture
a
© 2008 Microchip Technology Inc.
capture
module
event
is
defined
occurs,
as
if