PIC18LF2431-I/SO Microchip Technology, PIC18LF2431-I/SO Datasheet - Page 167

• Manufacturer Part Number: PIC18LF2431-I/SO
• Description: IC MCU FLASH 8KX16 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF2431-I/SO

• Core Size: 8-Bit
• Program Memory Size: 16KB (8K 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): 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: PIC18LF
• 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, ICE2000, ICE4000, DM183021, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

16.1.2
The Period Measurement mode is selected by setting
CAPxM3:CAPxM0 = 0101. In this mode, the value of
Timer5 is latched into the CAPxBUF register on the
rising edge of the input capture trigger and Timer5 is
subsequently reset to 0000h (optional by setting
CAPxREN = 1) on the next T
relationship in Figure 16-4).
16.1.3
The Pulse-Width Measurement mode can be configured
for two different edge sequences, such that the pulse
width is based on either the falling to rising edge of the
CAPx input pin (CAPxM3:CAPxM0 = 0110), or on the
rising to falling edge (CAPxM3:CAPxM0 = 0111).
FIGURE 16-5:
© 2007 Microchip Technology Inc.
Note 1: TMR5 is a synchronous time base input to the input capture, prescaler = 1:1. It increments on every Q1 rising edge.
TMR5
CAP1 Pin
CAP1BUF
TMR5 Reset
Instruction
Execution
2: IC1 is configured in Pulse-Width Measurement mode (CAP1M3:CAP1M0 = 0111, rising to falling pulse-width
3: TMR5 value is latched by CAP1BUF on T
4: TMR5 Reset is normally an asynchronous Reset signal to TMR5. When used in Pulse-Width Measurement mode, it
5: TMR5 Reset pulse is activated on the capture edge. CAP1REN bit has no bearing in this mode.
(1)
(2)
PERIOD MEASUREMENT MODE
PULSE-WIDTH MEASUREMENT
MODE
(2)
measurement). No noise filter on CAP1 input is used. MOVWF instruction loads CAP1CON when W = 0111.
ture event, the write will always take precedence. All Input Capture Buffers, CAP1BUF, CAP2BUF and CAP3BUF, are
updated with the incremented value of the time base on the next T
(see Note 4 when Reset occurs).
is always present on the edge that first initiates the pulse-width measurement (i.e., when configured in the rising to
falling Pulse-Width Measurement mode), it is active on each rising edge detected. In the falling to rising Pulse-Width
Measurement mode, it is active on each falling edge detected.
(3)
(4,5)
MOVWF CAP1CON
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
PULSE-WIDTH MEASUREMENT MODE TIMING
0012
CY
(see capture and Reset
0013
0014
PIC18F2331/2431/4331/4431
CY
Preliminary
rising edge. In the event that a write to TMR5 coincides with an input cap-
0015
0015
0000
Timer5 is always reset on the edge when the
measurement is first initiated. For example, when the
measurement is based on the falling to rising edge,
Timer5 is first reset on the falling edge and the timer
value is captured on the rising edge thereafter. Upon
entry into the Pulse-Width Measurement mode, the
very first edge detected on the CAPx pin is always
captured. The TMR5 value is reset on the first active
edge (see Figure 16-5).
0001
CY
clock edge when the capture event takes place
0002
0001
0000
0001
DS39616C-page 165
0002
0002