PIC18F4431-E/P Microchip Technology, PIC18F4431-E/P Datasheet - Page 246

• Manufacturer Part Number: PIC18F4431-E/P
• Description: IC MCU FLASH 8KX16 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4431-E/P

• 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: 36
• 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 9x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Controller Family/series: PIC18
• No. Of I/o's: 36
• 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: 36
• Number Of Timers: 1 x 8
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 125 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, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 9 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DVA18XP400 - DEVICE ADAPTER 18F4220 PDIP 40LDACICE0206 - ADAPTER MPLABICE 40P 600 MIL
• Lead Free Status / Rohs Status: Details

PIC18F2331/2431/4331/4431
The A/D channels are grouped into four sets of 2 or
3 channels. For the PIC18F2331/2431 devices, AN0
and AN4 are in Group A, AN1 is in Group B, AN2 is in
Group C and AN3 is in Group D. For the PIC18F4331/
4431 devices, AN0, AN4 and AN8 are in Group A, AN1
and AN5 are in Group B, AN2 and AN6 are in Group C
and AN3 and AN7 are in Group D. The selected chan-
nel in each group is selected by configuring the A/D
Channel Select Register, ADCHS.
The analog voltage reference is software selectable to
either the device’s positive and negative analog supply
voltage (AV
RA3/AN3/V
CAP1/INDX, or some combination of supply and
external sources. Register ADCON1 controls the
voltage reference settings.
FIGURE 21-1:
DS39616D-page 246
AN3/V
Note 1:
AN2/V
AN8
AN6
AN5
AN7
REF
AN0
AN4
REF
AN1
2:
(1)
(1)
(1)
(1)
+
-
REF
DD
AN5 through AN8 are available only on PIC18F4331/4431 devices.
I/O pins have diode protection to V
and AV
+/CAP2/QEA
ACMOD<1:0>,
ACMOD<1:0>,
GxSEL<1:0>
GxSEL<1:0>
SS
A/D BLOCK DIAGRAM
Analog
Analog
MUX
), or the voltage level on the
MUX
and
V
V
REF
REF
+
-
RA2/AN2/V
AV
AV
SS
SS
(2)
AV
DD
DD
ACMODx
and V
S/H-2
S/H-1
+
-
+
ACONV
-
S/H
ACSCH
(2)
S/H
REF
SS
-/
AV
.
SS (2)
Cntrl.
Seq.
The A/D Converter has a unique feature of being able
to operate while the device is in Sleep mode. To
operate in Sleep, the A/D conversion clock must be
derived from the A/D’s internal RC oscillator.
A device Reset forces all registers to their Reset state.
This forces the A/D module to be turned off and any
conversion in progress is aborted.
Each port pin associated with the A/D Converter can
individually be configured as an analog input or digital
I/O using the ANSEL0 and ANSEL1 registers. The
ADRESH and ADRESL registers contain the value in
the
(ADCON1<1:0>). The result buffer is a 4-deep circular
buffer that has a Buffer Empty status bit, BFEMT
(ADCON1<3>), and a Buffer Overflow status bit,
BFOVFL (ADCON1<2>).
result
V
REFL
1
2
3
4
10
4x10-Bit FIFO
VCFG<1:0>
ADC
buffer
V
REFH
pointed
 2010 Microchip Technology Inc.
ADRESH, ADRESL
00
01
10
11
MUX
to
by
ADPNT<1:0>
ADPNT<1:0>