PIC18LF27J13T-I/SO Microchip Technology, PIC18LF27J13T-I/SO Datasheet - Page 377
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PIC18LF27J13T-I/SO
Manufacturer Part Number
PIC18LF27J13T-I/SO
Description
28-pin, GP, 128KB Flash, 4KB RAM, 12 MIPS, 12-bit ADC 28 SOIC .300in T/R
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Specifications of PIC18LF27J13T-I/SO
Core Processor
PIC
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
22
Program Memory Size
128KB (64K x 16)
Program Memory Type
FLASH
Ram Size
3.8K x 8
Voltage - Supply (vcc/vdd)
2 V ~ 2.75 V
Data Converters
A/D 10x10b/12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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FIGURE 22-3:
FIGURE 22-4:
22.7
The A/D Converter in the PIC18F47J13 family of
devices includes a self-calibration feature, which com-
pensates for any offset generated within the module.
The calibration process is automated and is initiated by
setting the ADCAL bit (ADCON1<6>). The next time
the GO/DONE bit is set, the module will perform an off-
set calibration and store the result internally. Thus,
subsequent offsets will be compensated.
Example 22-1 provides an example of a calibration
routine.
2010 Microchip Technology Inc.
(Holding capacitor continues
acquiring input)
Set GO/DONE bit
1
A/D Converter Calibration
T
T
CY
Set GO/DONE bit
Automatic
Acquisition
Time
ACQT
Holding capacitor is disconnected from analog input (typically 100 ns)
2
- T
AD
Cycles
Conversion starts
T
3
AD
A/D CONVERSION T
A/D CONVERSION T
1 T
4
AD
b9
2 T
(Holding capacitor is disconnected)
Conversion starts
1
AD
b8
3 T
b9
2
AD
Next Q4: ADRESH:ADRESL are loaded, GO/DONE bit is cleared,
b7
Next Q4: ADRESH/ADRESL are loaded, GO/DONE bit is cleared,
4 T
b8
3
AD
AD
AD
b6
5 T
CYCLES (ACQT<2:0> = 000, T
CYCLES (ACQT<2:0> = 010, T
Preliminary
ADIF bit is set, holding capacitor is reconnected to analog input.
ADIF bit is set, holding capacitor is connected to analog input.
b7
4
AD
b5
6 T
T
5
b6
AD
AD
b4
PIC18F47J13 FAMILY
7 T
Cycles
The calibration process assumes that the device is in a
relatively steady-state operating condition. If A/D
calibration is used, it should be performed after each
device Reset or if there are other major changes in
operating conditions.
b5
6
AD
b3
8
b4
T
7
AD
b2
9 T
b3
8
AD
b1
10
ACQ
ACQ
T
b2
9
AD
b0
11
= 0)
= 4 T
10
b1
AD
DS39974A-page 377
b0
)
11
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