DSPIC30F3010-30I/SO Microchip Technology, DSPIC30F3010-30I/SO Datasheet - Page 98
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DSPIC30F3010-30I/SO
Manufacturer Part Number
DSPIC30F3010-30I/SO
Description
IC DSPIC MCU/DSP 24K 28SOIC
Manufacturer
Microchip Technology
Series
dsPIC™ 30Fr
Datasheets
1.DSPIC30F3010-30ISO.pdf
(228 pages)
2.DSPIC30F3010-30ISO.pdf
(18 pages)
3.DSPIC30F3010-30ISO.pdf
(6 pages)
4.DSPIC30F3010-30ISO.pdf
(16 pages)
5.DSPIC30F3010-30ISO.pdf
(22 pages)
6.DSPIC30F3014-30IP.pdf
(244 pages)
Specifications of DSPIC30F3010-30I/SO
Program Memory Type
FLASH
Program Memory Size
24KB (8K x 24)
Package / Case
28-SOIC (7.5mm Width)
Core Processor
dsPIC
Core Size
16-Bit
Speed
30 MIPs
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, Motor Control PWM, QEI, POR, PWM, WDT
Number Of I /o
20
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
Product
DSCs
Data Bus Width
16 bit
Processor Series
DSPIC30F
Core
dsPIC
Maximum Clock Frequency
30 MHz
Data Ram Size
1 KB
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52713-733, 52714-737, 53276-922, EWDSPIC
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE4000, DM240002, DM300027, DM330011, DM300018, DM183021
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT28SO-1 - SOCKET TRANSITION 28SOIC 300MIL
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
DSPIC30F301030ISO
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DSPIC30F3010-30I/SO
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
dsPIC30F
14.1
A typical incremental (a.k.a. optical) encoder has three
outputs: Phase A, Phase B, and an index pulse. These
signals are useful and often required in position and
speed control of ACIM and SR motors.
The two channels, Phase A (QEA) and Phase B (QEB),
have a unique relationship. If Phase A leads Phase B,
then the direction (of the motor) is deemed positive or
forward. If Phase A lags Phase B, then the direction (of
the motor) is deemed negative or reverse.
A third channel, termed index pulse, occurs once per
revolution and is used as a reference to establish an
absolute position. The index pulse coincides with
Phase A and Phase B, both low.
14.2
The 16-bit Up/Down Counter counts up or down on
every count pulse, which is generated by the difference
of the Phase A and Phase B input signals. The counter
acts as an integrator, whose count value is proportional
to position. The direction of the count is determined by
the UPDN signal, which is generated by the
Quadrature Encoder Interface Logic.
14.2.1
Position count error checking in the QEI is provided for
and indicated by the CNTERR bit (QEICON<15>). The
error checking only applies when the position counter
is configured for Reset on the Index Pulse modes
(QEIM<2:0> = ‘110’ or ‘100’). In these modes, the con-
tents of the POSCNT register is compared with the val-
ues (0xFFFF or MAXCNT+1, depending on direction).
If these values are detected, an error condition is gen-
erated by setting the CNTERR bit and a QEI count
error interrupt is generated. The QEI count error inter-
rupt can be disabled by setting the CEID bit (DFLT-
CON<8>). The position counter continues to count
encoder edges after an error has been detected. The
POSCNT register continues to count up/down until a
natural rollover/underflow. No interrupt is generated for
the natural rollover/underflow event. The CNTERR bit
is a read/write bit and reset in software by the user.
14.2.2
The position counter Reset enable bit, POSRES
(QEI<2>) controls whether the position counter is reset
when the index pulse is detected. This bit is only
applicable when QEIM<2:0> = ‘100’ or ‘110’.
If the POSRES bit is set to ‘1’, then the position counter
is reset when the index pulse is detected. If the
POSRES bit is set to ‘0’, then the position counter is not
DS70082G-page 96
Quadrature Encoder Interface
Logic
16-bit Up/Down Position Counter
Mode
POSITION COUNTER ERROR
CHECKING
POSITION COUNTER RESET
Preliminary
reset when the index pulse is detected. The position
counter will continue counting up or down, and will be
reset on the rollover or underflow condition.
The interrupt is still generated on the detection of the
index pulse and not on the position counter overflow/
underflow.
14.2.3
As mentioned in the previous section, the QEI logic
generates an UPDN signal, based upon the relation-
ship between Phase A and Phase B. In addition to the
output pin, the state of this internal UPDN signal is sup-
plied to a SFR bit UPDN (QEICON<11>) as a read only
bit. To place the state of this signal on an I/O pin, the
SFR bit PCDOUT (QEICON<6>) must be 1.
The IMV<1:0> control bits (DFLTCON<10:9>) deter-
mine the state of the QEA and QEB signals for which
the reset of the position counter will take place.
14.3
There are two Measurement modes which are sup-
ported and are termed x2 and x4. These modes are
selected by the QEIM<2:0> mode select bits located in
SFR QEICON<10:8>.
When control bits QEIM<2:0> = 100 or 101, the x2
Measurement mode is selected and the QEI logic only
looks at the Phase A input for the position counter
increment rate. Every rising and falling edge of the
Phase A signal causes the position counter to be incre-
mented or decremented. The Phase B signal is still uti-
lized for the determination of the counter direction, just
as in the x4 mode.
Within the x2 Measurement mode, there are two
variations of how the position counter is reset:
1.
2.
When control bits QEIM<2:0> = 110 or 111, the x4
Measurement mode is selected and the QEI logic looks
at both edges of the Phase A and Phase B input sig-
nals. Every edge of both signals causes the position
counter to increment or decrement.
Within the x4 Measurement mode, there are two
variations of how the position counter is reset:
1.
2.
The x4 Measurement mode provides for finer resolu-
tion data (more position counts) for determining motor
position.
Position counter reset by detection of index
pulse, QEIM<2:0> = 100.
Position counter reset by match with MAXCNT,
QEIM<2:0> = 101.
Position counter reset by detection of index
pulse, QEIM<2:0> = 110.
Position counter reset by match with MAXCNT,
QEIM<2:0> = 111.
Position Measurement Mode
COUNT DIRECTION STATUS
2004 Microchip Technology Inc.