PIC18F4431-I/P Microchip Technology Inc., PIC18F4431-I/P Datasheet - Page 179
![no-image](/images/manufacturer_photos/0/4/440/microchip_technology_inc__sml.jpg)
PIC18F4431-I/P
Manufacturer Part Number
PIC18F4431-I/P
Description
Microcontroller; 16 KB Flash; 768 RAM; 256 EEPROM; 36 I/O; 40-Pin-PDIP
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F4431-IP.pdf
(396 pages)
Specifications of PIC18F4431-I/P
A/d Inputs
9-Channel, 10-Bit
Cpu Speed
10 MIPS
Eeprom Memory
256 Bytes
Input Output
36
Interface
I2C/SPI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
40-pin PDIP
Programmable Memory
16K Bytes
Ram Size
768 Bytes
Speed
40 MHz
Timers
1-8-bit, 3-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F4431-I/P
Manufacturer:
ABB
Quantity:
240
Company:
Part Number:
PIC18F4431-I/P
Manufacturer:
MICROCHIP
Quantity:
769
Part Number:
PIC18F4431-I/P
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
Company:
Part Number:
PIC18F4431-I/PT
Manufacturer:
MICROCHIP
Quantity:
1 400
Company:
Part Number:
PIC18F4431-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
PIC18F4431-I/PT
Manufacturer:
MICROCHI
Quantity:
20 000
- Current page: 179 of 396
- Download datasheet (8Mb)
FIGURE 16-13:
16.2.6.2
The velocity event pulse (velcap, see Figure 16-12)
serves as the TMR5 capture trigger to IC1 while in the
Velocity mode. The number of velocity events are
reduced by the velocity postscaler before they are used
as the input capture clock. The velocity event reduction
ratio can be set with the PDEC1:PDEC0 control bits
(QEICON<1:0>) to 1:4, 1:16, 1:64 or no reduction (1:1).
The velocity postscaler settings are automatically
reloaded from their previous values as the Velocity
mode is re-enabled.
2003 Microchip Technology Inc.
Note 1: Timing shown is for QEIM<2:0> = 101, 110 or 111 (x4 Update mode enabled) and the velocity postscaler divide ratio
Instr.
Execution
2: VELR register latches the TMR5 count on the “velcap” capture pulse. Timer5 must be set to the synchronous timer or
3: The TMR5 counter is reset on the next Q1 clock cycle following the “velcap” pulse. TMR5 value is unaffected when the
4: IC1IF interrupt is enabled by setting IC1IE as follows, BSF PIE2, IC1IE. Assume IC1E bit is placed in PIE2 Peripheral
5: Post decimation value is changed from PDEC = 01 (decimate by 4) to PDEC = 00 (decimate by 1).
is set to divide by 4 (PDEC<1:0> = 01).
Counter mode. In this example, it is set to the Synchronous Timer mode where the TMR5 prescaler divide ratio = 1
(i.e., Timer5 clock = T
Velocity Measurement mode is first enabled (VELM = 0). The velocity postscaler values must be reconfigured to their
previous settings when re-entering Velocity Measurement mode. While making speed measurements of very slow
rotational speeds (e.g., servo-controller applications), the Velocity Measurement mode may not provide sufficient
precision. The Pulse Width Measurement mode may have to be used to provide the additional precision. In this case,
the input pulse is measured on the CAP1 input pin.
Interrupt Enable register in the target device. The actual IC1IF bit is written on Q2 rising edge.
QEA
QEB
vel_out
velcap
TMR5
VELR
cnt_reset
IC1IF
CAP1REN
Velocity Postscaler
BCF TMR5CON, VELM
(4)
(2)
(2)
(3)
VELOCITY MEASUREMENT TIMING
CY
).
BCF PIE2, IC1IE
Old Value
PIC18F2331/2431/4331/4431
Q1
BSF PIE2, IC1IE
Preliminary
1529
Forward
16.2.6.3
The TMR5 value can be reset (TMR5 register pair =
0000h) on a velocity event capture by setting the
CAP1REN bit (CAP1CON<6>). When CAP1REN is
cleared, the TMR5 time base will not be reset on any
velocity event capture pulse. The VELR register pair,
however, will continue to be updated with the current
TMR5 value.
Q1
(1)
MOVWF QEICON
1537
CAP1REN in Velocity Mode
Reverse
(5)
Q1
DS39616B-page 177
Related parts for PIC18F4431-I/P
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![PIC18F-LF1XK50](/images/no-image3.png)
Part Number:
Description:
20-Pin USB Flash Microcontrollers
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
![PIC18F6393T-I/PT](/photos/6/81/68123/c04-066_pf_tmb.jpg)
Part Number:
Description:
PIC18F With 128-segment LCD Driver And 12-bit ADC, 8KB Flash, 768B RAM, CCP, MSS
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F6493T-I/PT](/photos/6/81/68123/c04-066_pf_tmb.jpg)
Part Number:
Description:
PIC18F With 128-segment LCD Driver And 12-bit ADC, 16KB Flash, 768B RAM, CCP, MS
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F8393T-I/PT](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
PIC18F With 192-segment LCD Driver And 12-bit ADC, 8KB Flash, 768B RAM, CCP, MSS
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F8493T-I/PT](/images/manufacturer_photos/0/4/439/microchip_technology_tmb.jpg)
Part Number:
Description:
PIC18F With 192-segment LCD Driver And 12-bit ADC, 16KB Flash, 768B RAM, CCP, MS
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F6585-I/L](/photos/16/12/161282/68-plcc-large-300dpi-lyrd_tmb.jpg)
Part Number:
Description:
Microcontrollers (MCU) 48KB 3328 RAM 52 I/O
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F6680-I/L](/photos/16/12/161282/68-plcc-large-300dpi-lyrd_tmb.jpg)
Part Number:
Description:
Microcontrollers (MCU) 64KB 3328 RAM 52 I/O
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F65K90T-I/MR](/photos/16/3/160368/qfn64_tmb.jpg)
Part Number:
Description:
32kB Flash, 2kB RAM, 1kB EE, NanoWatt XLP, LCD 64 QFN 9x9x0.9mm T/R
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F65K90T-I/PT](/photos/16/3/160367/tqfp-64_tmb.jpg)
Part Number:
Description:
32kB Flash, 2kB RAM, 1kB EE, NanoWatt XLP, LCD 64 TQFP 10x10x1mm T/R
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F87K90T-I/PT](/photos/40/31/403173/tqfp-80_tmb.jpg)
Part Number:
Description:
128kB Flash, 4kB RAM, 1kB EE, 16MIPS, NanoWatt XLP, LCD, 5V 80 TQFP 12x12x1mm T/
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F65K90-I/MR](/photos/16/3/160368/qfn64_tmb.jpg)
Part Number:
Description:
32kB Flash, 2kB RAM, 1kB EE, NanoWatt XLP, LCD 64 QFN 9x9x0.9mm TUBE
Manufacturer:
Microchip Technology
Datasheet:
![PIC18F65K90-I/PT](/photos/16/3/160367/tqfp-64_tmb.jpg)
Part Number:
Description:
32kB Flash, 2kB RAM, 1kB EE, NanoWatt XLP, LCD 64 TQFP 10x10x1mm TRAY
Manufacturer:
Microchip Technology
![PIC18F87K90-I/PT](/photos/40/31/403173/tqfp-80_tmb.jpg)
Part Number:
Description:
128kB Flash, 4kB RAM, 1kB EE, 16MIPS, NanoWatt XLP, LCD, 5V 80 TQFP 12x12x1mm TR
Manufacturer:
Microchip Technology