PIC18LF4523-I/P Microchip Technology, PIC18LF4523-I/P Datasheet - Page 29

• Manufacturer Part Number: PIC18LF4523-I/P
• Description: IC PIC MCU FLASH 16KX16 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF4523-I/P

• Core Size: 8-Bit
• Program Memory Size: 32KB (16K x 16)
• Oscillator Type: Internal
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 13x12b
• Operating Temperature: -40°C ~ 85°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: 1536Byte
• Cpu Speed: 25MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The value in the ADRESH:ADRESL registers is
unknown following POR and BOR Resets and is not
affected by any other Reset.
After the A/D module has been configured as desired,
the selected channel must be acquired before the
conversion is started. The analog input channels must
have their corresponding TRIS bits selected as inputs.
To determine acquisition time, see Section 2.1 “A/D
Acquisition Requirements”.
After this acquisition time has elapsed, the A/D conver-
sion can be started. An acquisition time can be
programmed to occur between setting the GO/DONE
bit and the actual start of the conversion.
The following steps should be followed to perform an A/D
conversion:
1.
2.
3.
4.
FIGURE 2-3:
© 2009 Microchip Technology Inc.
Configure the A/D module:
• Configure analog pins, voltage reference and
• Select A/D input channel (ADCON0)
• Select A/D acquisition time (ADCON2)
• Select A/D conversion clock (ADCON2)
• Turn on the A/D module (ADCON0)
Configure the A/D interrupt (if desired):
• Clear ADIF bit
• Set ADIE bit
• Set GIE bit
Wait the required acquisition time (if required).
Start conversion by setting the GO/DONE bit
(ADCON0<1>).
digital I/O (ADCON1)
Legend: C
V
AIN
Rs
ANALOG INPUT MODEL
V
I
R
SS
C
R
LEAKAGE
T
PIN
IC
HOLD
SS
ANx
C
5 pF
PIN
= Input Capacitance
= Threshold Voltage
= Leakage Current at the pin due to
= Interconnect Resistance
= Sampling Switch
= Sample/Hold Capacitance (from DAC)
= Sampling Switch Resistance
various junctions
V
PIC18F2423/2523/4423/4523
DD
V
V
T
T
= 0.6V
= 0.6V
I
±100 nA
5.
6.
7.
FIGURE 2-2:
LEAKAGE
R
Wait for the A/D conversion to complete by either:
• Polling for the GO/DONE bit to be cleared
OR
• Waiting for the A/D interrupt
Read the A/D Result registers (ADRESH:ADRESL)
and clear the ADIF bit, if required.
For the next conversion, go to step 1 or step 2,
as required.
The A/D conversion time per bit is defined as
T
the next acquisition starts.
FFEh
FFFh
IC
003h
002h
001h
000h
AD
≤ 1k
. A minimum wait of 2 T
V
Sampling
SS
DD
Switch
6V
5V
4V
3V
2V
R
Analog Input Voltage
SS
A/D TRANSFER FUNCTION
Sampling Switch
1
V
C
SS
2
AD
HOLD
3
is required before
= 25 pF
DS39755C-page 29
4
(kΩ)