PIC18F86K22-I/PTRSL Microchip Technology, PIC18F86K22-I/PTRSL Datasheet - Page 349

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PIC18F86K22-I/PTRSL

Manufacturer Part Number
PIC18F86K22-I/PTRSL
Description
MCU PIC 64K FLASH XLP 80TQFP
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr

Specifications of PIC18F86K22-I/PTRSL

Core Size
8-Bit
Program Memory Size
64KB (32K x 16)
Core Processor
PIC
Speed
64MHz
Connectivity
EBI/EMI, I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
69
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 24x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
80-TFQFP
Controller Family/series
PIC18
Eeprom Memory Size
1024Byte
Ram Memory Size
3862Byte
Cpu Speed
16MIPS
No. Of Timers
11
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC18F86K22-I/PTRSL
Manufacturer:
Microchip Technology
Quantity:
10 000
23.0
The Analog-to-Digital (A/D) Converter module in the
PIC18F87K22 family of devices has 16 inputs for the
64-pin devices and 24 inputs for the 80-pin devices.
This module allows conversion of an analog input
signal to a corresponding 12-bit digital number.
The module has these registers:
• A/D Control Register 0 (ADCON0)
• A/D Control Register 1 (ADCON1)
• A/D Control Register 2 (ADCON2)
• A/D Port Configuration Register 0 (ANCON0)
• A/D Port Configuration Register 1 (ANCON1)
• A/D Port Configuration Register 2 (ANCON2)
• ADRESH (the upper, A/D Results register)
• ADRESL (the lower, A/D Results register)
The ADCON0 register, shown in Register 23-1, con-
trols the operation of the A/D module. The ADCON1
register, shown in Register 23-2, configures the voltage
reference and special trigger selection. The ADCON2
register, shown in Register 23-3, configures the A/D
clock source and programmed acquisition time and
justification.
 2010 Microchip Technology Inc.
12-BIT ANALOG-TO-DIGITAL
CONVERTER (A/D) MODULE
Preliminary
PIC18F87K22 FAMILY
23.1
The converter in PIC18F87K22 family devices is
implemented as a differential A/D where the differential
voltage between two channels is measured and
converted to digital values (see Figure 23-1).
The converter also can be configured to measure a
voltage from a single input by clearing the CHSN bits
(ADCON1<2:0>). With this configuration, the negative
channel input is connected internally to AV
Figure 23-2).
FIGURE 23-1:
Differential conversion feeds the two input channels to
a unity gain differential amplifier. The positive channel
input is selected using the CHS bits (ADCON0<6:2>)
and the negative channel input is selected using the
CHSN bits (ADCON1<2:0>).
The output from the amplifier is fed to the A/D Con-
verter, as shown in Figure 23-1. The 12-bit result is
available on the ADRESH and ADRESL registers. An
additional bit indicates if the 12-bit result is a positive or
negative value.
FIGURE 23-2:
In the single-channel measurement mode, the negative
input is connected to A
(ADCON1<2:0>).
Positive input
CHS<4:0>
CHSN<2:0>
= 000
Positive input
CHS<4:0>
Negative input
CHSN<2:0>
Differential A/D Converter
AV
SS
+
+
DIFFERENTIAL CHANNEL
MEASUREMENT
SINGLE CHANNEL
MEASUREMENT
VSS
by clearing the CHSN bits
DS39960B-page 349
ADC
ADC
SS
(see

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