PIC18F2221-E/SO Microchip Technology, PIC18F2221-E/SO Datasheet - Page 25

• Manufacturer Part Number: PIC18F2221-E/SO
• Description: 4KB, Flash, 512bytes-RAM, 25I/O, 8-bit Family,nanoWatt 28 SOIC .300in TUBE
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2221-E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.0
2.1
Getting started with the PIC18F2221/2321/4221/4321
family family of 8-bit microcontrollers requires attention
to a minimal set of device pin connections before
proceeding with development.
The following pins must always be connected:
• All V
• All AV
• MCLR pin
These pins must also be connected if they are being
used in the end application:
• PGC/PGD pins used for In-Circuit Serial
• OSCI and OSCO pins when an external oscillator
Additionally, the following pins may be required:
• V
The minimum mandatory connections are shown in
Figure 2-1.
© 2009 Microchip Technology Inc.
(see Section 2.2 “Power Supply Pins”)
not the analog device features are used
(see Section 2.2 “Power Supply Pins”)
(see Section 2.3 “Master Clear (MCLR) Pin”)
Programming™ (ICSP™) and debugging purposes
(see Section 2.4 “ICSP Pins”)
source is used
(see Section 2.5 “External Oscillator Pins”)
reference for analog modules is implemented
Note:
REF
DD
+/V
DD
GUIDELINES FOR GETTING
STARTED WITH PIC18F
MICROCONTROLLERS
Basic Connection Requirements
and V
REF
and AV
The AV
connected, regardless of whether any of
the analog modules are being used.
- pins used when external voltage
SS
SS
pins
DD
pins, regardless of whether or
and AV
PIC18F2221/2321/4221/4321 FAMILY
SS
pins must always be
FIGURE 2-1:
Key (all values are recommendations):
C1 through C6: 0.1 μF, 20V ceramic
C7: 10 μF, 16V tantalum or ceramic
R1: 10 kΩ
R2: 100Ω to 470Ω
Note 1:
V
DD
C6
R1
C1
(1)
R2
The example shown is for a PIC18F device
with five V
Other devices may have more or less pairs;
adjust the number of decoupling capacitors
appropriately.
MCLR
V
V
SS
DD
C5
DD
PIC18FXXXX
RECOMMENDED
MINIMUM CONNECTIONS
(1)
/V
SS
C2
and AV
(1)
C4
DD
DS39689F-page 25
(1)
/AV
V
V
SS
DD
SS
pairs.
C3
(1)