PIC18F2331-I/SP Microchip Technology, PIC18F2331-I/SP Datasheet - Page 247

• Manufacturer Part Number: PIC18F2331-I/SP
• Description: IC PIC MCU FLASH 4KX16 28DIP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2331-I/SP

• Program Memory Type: FLASH
• Program Memory Size: 8KB (4K 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, LVD, Power Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 24
• 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
• 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
• 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, ICE4000, ICE2000, DM183021, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5-ch x 10-bit
• Package: 28SPDIP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: I3-DB18F4431 - BOARD DAUGHTER ICEPIC3AC164035 - MODULE SKT FOR 18F2X31 28SOICDVA18XP280 - DEVICE ADAPTER 18F2220 PDIP 28LD
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

21.1
The A/D Converter has two types of conversions, two
modes of operation and eight different Sequencing
modes. These features are controlled by the ACONV
bit (ADCON0<5>), ACSCH bit (ADCON0<4>) and
ACMOD<1:0> bits (ADCON0<3:2>). In addition, the
A/D channels are divided into four groups as defined
in the ADCHS register.
sequence configurations as controlled by the ACSCH
and ACMOD<1:0> bits.
21.1.1
Two types of conversions exist in the high-speed 10-bit
A/D Converter module that are selected using the
ACONV bit. Single-Shot mode allows a single conversion
or sequence to be enabled when ACONV = 0. At the end
of the sequence, the GO/DONE bit will be automatically
cleared and the interrupt flag, ADIF, will be set. When
using
Simultaneous mode, STNM2, acquisition time must be
used to ensure proper conversion of the analog input
signals.
TABLE 21-1:
 2010 Microchip Technology Inc.
Multi-Channel Sequential Mode 1
(SEQM1)
Multi-Channel Sequential Mode 2
(SEQM2)
Multi-Channel Simultaneous Mode 1
(STNM1)
Multi-Channel Simultaneous Mode 2
(STNM2)
Single Channel Mode 1 (SCM1)
Single Channel Mode 2 (SCM2)
Single Channel Mode 3 (SCM3)
Single Channel Mode 4 (SCM4)
Single-Shot
Configuring the A/D Converter
CONVERSION TYPE
Mode
AUTO-CONVERSION SEQUENCE CONFIGURATIONS
mode
Table 21-1
and
configured
ACSCH ACMOD<1:0>
shows the
1
1
1
1
0
0
0
0
PIC18F2331/2431/4331/4431
for
00
01
10
11
00
01
10
11
Continuous Loop mode allows the defined sequence to
be executed in a continuous loop when ACONV = 1. In
this mode, either the user can trigger the start of
conversion by setting the GO/DONE bit, or one of the
A/D triggers can start the conversion. The interrupt flag,
ADIF, is set based on the configuration of the bits,
ADRS<1:0> (ADCON3<7:6>). In Simultaneous modes,
STNM1 and STNM2 acquisition time must be config-
ured to ensure proper conversion of the analog input
signals.
21.1.2
The ACSCH bit (ADCON0<4>) controls how many
channels are used in the configured sequence. When
clear, the A/D is configured for single channel conver-
sion and will convert the group selected by the
ACMOD<1:0> bits and the channel selected by the
GxSEL<1:0> bits (ADCHS register). When ACSCH = 1,
the A/D is configured for multiple channel conversion
and the sequence is defined by ACMOD<1:0>.
Groups A and B are sampled and converted
sequentially.
Groups A, B, C and D are sampled and converted
sequentially.
Groups A and B are sampled simultaneously and
converted sequentially.
Groups A and B are sampled simultaneously, then
converted sequentially. Then, Group C and D are
sampled simultaneously, then converted
sequentially.
Group A is sampled and converted.
Group B is sampled and converted.
Group C is sampled and converted.
Group D is sampled and converted.
CONVERSION MODE
Description
DS39616D-page 247