PIC18F2221-I/SS Microchip Technology, PIC18F2221-I/SS Datasheet - Page 171

IC PIC MCU FLASH 2KX16 28SSOP

PIC18F2221-I/SS

Manufacturer Part Number
PIC18F2221-I/SS
Description
IC PIC MCU FLASH 2KX16 28SSOP
Manufacturer
Microchip Technology
Series
PIC® 18Fr

Specifications of PIC18F2221-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)
4.2 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
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
EUSART, I2C, MSSP, SPI
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
25
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE4000, ICE2000, DV164136
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 10 Channel
Package
28SSOP
Device Core
PIC
Family Name
PIC18
Maximum Speed
40 MHz
Operating Supply Voltage
5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC164307 - MODULE SKT FOR PM3 28SSOP
Lead Free Status / Rohs Status
 Details

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC18F2221-I/SS
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
18.3.3
To enable the serial port, MSSP Enable bit, SSPEN
(SSPCON1<5>), must be set. To reset or reconfigure
SPI mode, clear the SSPEN bit, reinitialize the
SSPCON registers and then set the SSPEN bit. This
configures the SDI, SDO, SCK and SS pins as serial
port pins. For the pins to behave as the serial port
function, some must have their data direction bits (in
the TRIS register) appropriately programmed as
follows:
• SDI is automatically controlled by the SPI module
• SDO must have TRISC<5> bit cleared
• SCK (Master mode) must have TRISC<3> bit
• SCK (Slave mode) must have TRISC<3> bit set
• SS must have TRISA<5> bit set
FIGURE 18-2:
© 2009 Microchip Technology Inc.
cleared
ENABLING SPI I/O
SPI Master SSPM<3:0> = 00xxb
MSb
PROCESSOR 1
Serial Input Buffer
SPI MASTER/SLAVE CONNECTION
PIC18F2221/2321/4221/4321 FAMILY
Shift Register
(SSPBUF)
(SSPSR)
LSb
SDO
SCK
SDI
Serial Clock
Any serial port function that is not desired may be
overridden by programming the corresponding data
direction (TRIS) register to the opposite value.
18.3.4
Figure 18-2 shows a typical connection between two
microcontrollers. The master controller (Processor 1)
initiates the data transfer by sending the SCK signal.
Data is shifted out of both shift registers on their pro-
grammed clock edge and latched on the opposite edge
of the clock. Both processors should be programmed to
the same Clock Polarity (CKP), then both controllers
would send and receive data at the same time.
Whether the data is meaningful (or dummy data)
depends on the application software. This leads to
three scenarios for data transmission:
• Master sends data – Slave sends dummy data
• Master sends data – Slave sends data
• Master sends dummy data – Slave sends data
SDO
SCK
SDI
TYPICAL CONNECTION
SPI Slave SSPM<3:0> = 010xb
MSb
Serial Input Buffer
Shift Register
PROCESSOR 2
(SSPBUF)
(SSPSR)
LSb
DS39689F-page 171

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