PIC18F2431-I/MM Microchip Technology, PIC18F2431-I/MM Datasheet - Page 167
![16 KB Flash, 768 RAM, 22 I/O 28 QFN-S 6x6m TUBE](/photos/6/81/68120/150-28-qfn_sml.jpg)
PIC18F2431-I/MM
Manufacturer Part Number
PIC18F2431-I/MM
Description
16 KB Flash, 768 RAM, 22 I/O 28 QFN-S 6x6m TUBE
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.PIC18LF2331-ISO.pdf
(40 pages)
Specifications of PIC18F2431-I/MM
Core Processor
PIC
Core Size
8-Bit
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 Size
16KB (8K x 16)
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-QFN
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
4
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, ICE2000, ICE4000, DM183021, DV164136
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 5 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Request inventory verification / Request inventory verification
Other names
PIC18F2431-I/ML
PIC18F2431-I/ML
PIC18F2431-I/ML
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F2431-I/MM
Manufacturer:
Microchip Technology
Quantity:
135
Part Number:
PIC18F2431-I/MM
Manufacturer:
MICROCHI
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
- PIC18LF2331-ISO PDF datasheet #7
- Current page: 167 of 392
- Download datasheet (4Mb)
17.2.6
The velocity pulse generator, in conjunction with the
IC1 and the synchronous TMR5 (in synchronous
operation), provides a method for high accuracy speed
measurements at both low and high mechanical motor
speeds. The Velocity mode is enabled when the VELM
bit is cleared (= 0) and QEI is set to one of its operating
modes (see
To optimize register space, the Input Capture
Channel 1 (IC1) is used to capture TMR5 counter
values. Input Capture Buffer register, CAP1BUF, is
redefined in Velocity Measurement mode, VELM = 0,
as the Velocity Register Buffer (VELRH, VELRL).
TABLE 17-6:
FIGURE 17-12:
2010 Microchip Technology Inc.
QEIM<2:0>
CAP1/INDX
CAP2/QEA
001
010
101
110
CAP3/QEB
VELOCITY MEASUREMENT
Table
x2 Velocity Event mode. The velocity
pulse is generated on every QEA edge.
x4 Velocity Event mode. The velocity
pulse is generated on every QEA and
QEB active edge.
VELOCITY PULSES
17-6).
VELOCITY MEASUREMENT BLOCK DIAGRAM
Velocity Event Mode
QEB
QEA
INDX
Control
Logic
Velocity Event
QEI
Direction
Clock
PIC18F2331/2431/4331/4431
Postscaler
Reset
Logic
Position
Counter
TMR5 Reset
17.2.6.1
The event pulses are reduced by a fixed ratio by the
velocity pulse divider. The divider is useful for
high-speed measurements where the velocity events
happen frequently. By producing a single output pulse
for a given number of input event pulses, the counter
can track larger pulse counts (i.e., distance travelled)
for a given time interval. Time is measured by utilizing
the TMR5 time base.
Each velocity pulse serves as a capture pulse. With the
TMR5 in Synchronous Timer mode, the value of TMR5
is captured on every output pulse of the postscaler. The
counter is subsequently reset to ‘0’. TMR5 is reset
upon a capture event.
Figure 17-13
diagram.
Velocity Capture
Velocity Event Timing
shows the velocity measurement timing
(VELR Register)
TMR5
IC1
16
Clock
DS39616D-page 167
Velocity Mode
T
CY
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