PIC18LF2221-I/SS Microchip Technology, PIC18LF2221-I/SS Datasheet - Page 237
![IC PIC MCU FLASH 2KX16 28SSOP](/photos/6/81/68119/150-28-ssop_sml.jpg)
PIC18LF2221-I/SS
Manufacturer Part Number
PIC18LF2221-I/SS
Description
IC PIC MCU FLASH 2KX16 28SSOP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC18F2221-ISO.pdf
(402 pages)
2.PIC18F2221-ISO.pdf
(8 pages)
3.PIC18F2221-ISO.pdf
(30 pages)
4.PIC18F2221-ISO.pdf
(46 pages)
5.PIC18LF2221-IML.pdf
(394 pages)
Specifications of PIC18LF2221-I/SS
Core Size
8-Bit
Program Memory Size
4KB (2K x 16)
Core Processor
PIC
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, HLVD, POR, PWM, WDT
Number Of I /o
25
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 10x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SSOP
Controller Family/series
PIC18
No. Of I/o's
25
Eeprom Memory Size
256Byte
Ram Memory Size
512Byte
Cpu Speed
40MHz
No. Of Timers
4
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC18LF2221-I/SS
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
- PIC18F2221-ISO PDF datasheet
- PIC18F2221-ISO PDF datasheet #2
- PIC18F2221-ISO PDF datasheet #3
- PIC18F2221-ISO PDF datasheet #4
- PIC18LF2221-IML PDF datasheet #5
- Current page: 237 of 402
- Download datasheet (7Mb)
The value in the ADRESH:ADRESL registers is not
modified for a Power-on Reset. The ADRESH:ADRESL
registers will contain unknown data after a Power-on
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 an
input. To determine acquisition time, see Section 20.1
“A/D Acquisition Requirements”. After this acquisi-
tion time has elapsed, the A/D conversion 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 20-3:
© 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 A/D module (ADCON0)
Configure A/D interrupt (if desired):
• Clear ADIF bit
• Set ADIE bit
• Set GIE bit
Wait the required acquisition time (if required).
Start conversion:
• Set GO/DONE bit (ADCON0 register)
digital I/O (ADCON1)
Legend: C
V
AIN
Rs
V
I
R
SS
C
R
LEAKAGE
ANALOG INPUT MODEL
PIC18F2221/2321/4221/4321 FAMILY
PIN
T
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
DD
V
V
T
T
= 0.6V
= 0.6V
I
±100 nA
5.
6.
7.
FIGURE 20-2:
LEAKAGE
R
Wait for A/D conversion to complete, by either:
• Polling for the GO/DONE bit to be cleared
OR
• Waiting for the A/D interrupt
Read A/D Result registers (ADRESH:ADRESL);
clear bit ADIF, if required.
For next conversion, go to step 1 or step 2, as
required. The A/D conversion time per bit is
defined as T
required before the next acquisition starts.
IC
3FFh
3FEh
003h
002h
001h
000h
≤ 1k
V
DD
SS
Sampling
Switch
AD
6V
5V
4V
3V
2V
R
. A minimum wait of 2 T
SS
A/D TRANSFER FUNCTION
Analog Input Voltage
Sampling Switch
1
V
SS
2
C
HOLD
3
DS39689F-page 237
= 25 pF
4
(kΩ)
AD
is
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