PIC18F2420-I/SP Microchip Technology, PIC18F2420-I/SP Datasheet - Page 239

• Manufacturer Part Number: PIC18F2420-I/SP
• Description: IC MCU FLASH 8KX16 28-DIP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2420-I/SP

• Program Memory Type: FLASH
• Program Memory Size: 16KB (8K x 16)
• Package / Case: 28-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 25
• Eeprom Size: 256 x 8
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: SPI, I2C, USART
• Maximum Clock Frequency: 31 MHz
• Number Of Programmable I/os: 25
• Number Of Timers: 4
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DM163014, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Package: 28SPDIP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Data Rom Size: 256 KB
• Height: 3.3 mm
• Length: 34.67 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.2 V
• Width: 7.24 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DVA18XP280 - DEVICE ADAPTER 18F2220 PDIP 28LD
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

20.9
A simplified circuit for an analog input is shown in
Figure 20-4. Since the analog pins are connected to a
digital output, they have reverse biased diodes to V
and V
V
FIGURE 20-4:
TABLE 20-1:
© 2008 Microchip Technology Inc.
CMCON
CVRCON
INTCON
PIR2
PIE2
IPR2
PORTA
LATA
TRISA
Legend: — = unimplemented, read as ‘0’. Shaded cells are unused by the comparator module.
Note 1:
SS
Name
and V
SS
. The analog input, therefore, must be between
Analog Input Connection
Considerations
DD
PORTA<7:6> and their direction and latch bits are individually configured as port pins based on various
primary oscillator modes. When disabled, these bits are read as ‘0’.
. If the input voltage deviates from this
VA
GIE/GIEH PEIE/GIEL TMR0IE
TRISA7
LATA7
OSCFIF
OSCFIE
OSCFIP
CVREN
C2OUT
RA7
Bit 7
REGISTERS ASSOCIATED WITH COMPARATOR MODULE
R
S
Legend:
(1)
(1)
< 10k
(1)
COMPARATOR ANALOG INPUT MODEL
TRISA6
A
LATA6
CVROE
C1OUT
IN
RA6
CMIE
CMIP
CMIF
Bit 6
C
V
I
R
R
VA
LEAKAGE
C
5 pF
(1)
T
PIN
IC
S
(1)
PIN
(1)
PORTA Data Latch Register (Read and Write to Data Latch)
PORTA Data Direction Register
C2INV
CVRR
Bit 5
RA5
= Input Capacitance
= Threshold Voltage
= Leakage Current at the pin due to various junctions
= Interconnect Resistance
= Source Impedance
= Analog Voltage
—
—
—
PIC18F2420/2520/4420/4520
V
DD
CVRSS
INT0IE
C1INV
EEIE
EEIP
DD
Bit 4
EEIF
RA4
V
V
T
T
= 0.6V
= 0.6V
range by more than 0.6V in either direction, one of the
diodes is forward biased and a latch-up condition may
occur. A maximum source impedance of 10 kΩ is
recommended for the analog sources. Any external
component connected to an analog input pin, such as
a capacitor or a Zener diode, should have very little
leakage current.
BCLIF
BCLIE
BCLIP
CVR3
RBIE
Bit 3
RA3
CIS
I
±100 nA
V
LEAKAGE
TMR0IF
HLVDIE
HLVDIP
SS
HLVDIF
CVR2
Bit 2
CM2
RA2
R
IC
TMR3IF
TMR3IE
TMR3IP
INT0IF
CVR1
Bit 1
CM1
RA1
CCP2IF
CCP2IE
CCP2IP
Comparator
Input
CVR0
RBIF
DS39631E-page 237
Bit 0
CM0
RA0
on page
Values
Reset
51
51
52
52
52
52
52
52
52