PIC18F2221-E/SS Microchip Technology, PIC18F2221-E/SS Datasheet - Page 106

• Manufacturer Part Number: PIC18F2221-E/SS
• Description: 4KB, Flash, 512bytes-RAM, 25I/O, 8-bit Family,nanoWatt 28 SSOP .209in TUBE
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2221-E/SS

• 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-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC18F2221/2321/4221/4321 FAMILY
10.4
The IPR registers contain the individual priority bits for
the peripheral interrupts. Due to the number of periph-
eral interrupt sources, there are two Peripheral Interrupt
Priority registers (IPR1 and IPR2). Using the priority bits
requires that the Interrupt Priority Enable (IPEN) bit be
set.
REGISTER 10-8:
DS39689F-page 106
IPR Registers
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
IPR1: PERIPHERAL INTERRUPT PRIORITY REGISTER 1
Legend:
R = Readable bit
-n = Value at POR
bit 7
PSPIP: Parallel Slave Port Read/Write Interrupt Priority bit
1 = High priority
0 = Low priority
ADIP: A/D Converter Interrupt Priority bit
1 = High priority
0 = Low priority
RCIP: EUSART Receive Interrupt Priority bit
1 = High priority
0 = Low priority
TXIP: EUSART Transmit Interrupt Priority bit
1 = High priority
0 = Low priority
SSPIP: Master Synchronous Serial Port Interrupt Priority bit
1 = High priority
0 = Low priority
CCP1IP: CCP1 Interrupt Priority bit
1 = High priority
0 = Low priority
TMR2IP: TMR2 to PR2 Match Interrupt Priority bit
1 = High priority
0 = Low priority
TMR1IP: TMR1 Overflow Interrupt Priority bit
1 = High priority
0 = Low priority
PSPIP
R/W-1
Note 1: This bit is unimplemented on 28-pin devices and will read as ‘0’.
(1)
R/W-1
ADIP
R/W-1
RCIP
W = Writable bit
‘1’ = Bit is set
R/W-1
TXIP
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
SSPIP
R/W-1
(1)
CCP1IP
R/W-1
© 2009 Microchip Technology Inc.
TMR2IP
R/W-1
x = Bit is unknown
TMR1IP
R/W-1
bit 0