PIC18F2331-I/SO Microchip Technology, PIC18F2331-I/SO Datasheet - Page 174
![IC PIC MCU FLASH 4KX16 28SOIC](/photos/6/59/65909/150-28-soic_sml.jpg)
PIC18F2331-I/SO
Manufacturer Part Number
PIC18F2331-I/SO
Description
IC PIC MCU FLASH 4KX16 28SOIC
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F818-ISO.pdf
(6 pages)
3.PIC18F2331-ISO.pdf
(392 pages)
4.PIC18F2331-ISO.pdf
(8 pages)
5.PIC18F2331-ISO.pdf
(6 pages)
6.PIC18F2331-ISO.pdf
(16 pages)
7.PIC18F4331-EP.pdf
(400 pages)
Specifications of PIC18F2331-I/SO
Core Size
8-Bit
Program Memory Size
8KB (4K x 16)
Core Processor
PIC
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, Power Control PWM, QEI, POR, PWM, WDT
Number Of I /o
24
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 5x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (7.5mm Width)
Controller Family/series
PIC18
No. Of I/o's
24
Eeprom Memory Size
256Byte
Ram Memory Size
768Byte
Cpu Speed
40MHz
No. Of Timers
4
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
EUSART, I2C, SPI, SSP
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
24
Number Of Timers
1 x 8
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE4000, ICE2000, DM183021, DV164136
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
Package
28SOIC W
Device Core
PIC
Family Name
PIC18
Maximum Speed
40 MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT28SO-1 - SOCKET TRANSITION 28SOIC 300MILI3-DB18F4431 - BOARD DAUGHTER ICEPIC3
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC18F2331-I/SO
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
- PIC16F616T-ISL PDF datasheet
- PIC16F818-ISO PDF datasheet #2
- PIC18F2331-ISO PDF datasheet #3
- PIC18F2331-ISO PDF datasheet #4
- PIC18F2331-ISO PDF datasheet #5
- PIC18F2331-ISO PDF datasheet #6
- PIC18F4331-EP PDF datasheet #7
- Current page: 174 of 400
- Download datasheet (7Mb)
PIC18F2331/2431/4331/4431
16.2.3.3
The position counter will continue to increment or dec-
rement until one of the following events takes place.
The type of event and the direction of rotation when it
happens determines if a register Reset or update
occurs.
1.
2.
The value of the position counter is not affected during
QEI mode changes, nor when the QEI is disabled
altogether.
DS39616C-page 172
An index pulse is detected on the INDX input
(QEIM2:QEIM0 = 001).
If the encoder is traveling in the forward direc-
tion, POSCNT is reset (00h) on the next clock
edge after the index marker, INDX, has been
detected. The position counter resets on the
QEA or QEB edge once the INDX rising edge
has been detected.
If the encoder is traveling in the reverse direc-
tion, the value in the MAXCNT register is loaded
into POSCNT on the next quadrature pulse
edge (QEA or QEB) after the falling edge on
INDX has been detected.
A POSTCNT/MAXCNT period match occurs
(QEIM2:QEIM0 = 010).
If the encoder is traveling in the forward direc-
tion, POSCNT is reset (00h) on the next clock
edge when POSCNT = MAXCNT. An interrupt
event is triggered on the next T
(see Figure 16-10)
If the encoder is traveling in the reverse
direction and the value of POSCNT reaches
00h, POSCNT is loaded with the contents of the
MAXCNT register on the next clock edge. An
interrupt event is triggered on the next T
the load operation (see Figure 16-10).
Reset and Update Events
CY
after the Reset
CY
after
Preliminary
16.2.4
The position counter interrupt occurs and the interrupt
flag (IC2QEIF) is set, based on the following events:
• A POSCNT/MAXCNT period match event
• A POSCNT rollover (FFFFh to 0000h) in Period
• An index pulse detected on INDX
The interrupt timing diagrams for IC2QEIF are shown in
Figure 16-10 and Figure 16-11.
When the direction has changed, the direction change
interrupt flag (IC3DRIF) is set on the following T
clock (see Figure 16-10).
If the position counter rolls over in Index mode, the
QERR bit will be set.
16.2.5
The quadrature input signals, QEA and QEB, may vary
in quadrature frequency. The minimum quadrature
input period, T
The position count rate, F
the rotor’s RPM, line count D and QEI Update mode (x2
versus x4); that is,
EQUATION 16-1:
The maximum position count rate (i.e., x4 QEI
Update mode, D = 1024) with F
to 2.5 MHz, which corresponds to F
Figure 16-9 shows QEA and QEB quadrature input
timing when sampled by the noise filter.
(QEIM2:QEIM0 = 010 or 110)
mode only (QEIM2:QEIM0 = 010 or 110)
Note:
QEI INTERRUPTS
QEI SAMPLE TIMING
The number of incremental lines in the
position encoder is typically set at D = 1024
and the QEI Update mode = x4.
QEI
, is 16 T
F
POS
= 4D • RPM
© 2007 Microchip Technology Inc.
POS
CY
.
, is directly proportional to
60
CY
= 10 MIPS is equal
QEI
of 625 kHz.
CY
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