參數(shù)資料
型號: PIC18F4221T-I/ML
廠商: Microchip Technology
文件頁數(shù): 9/110頁
文件大小: 0K
描述: IC PIC MCU FLASH 2KX16 44QFN
標準包裝: 1,600
系列: PIC® 18F
核心處理器: PIC
芯體尺寸: 8-位
速度: 40MHz
連通性: I²C,SPI,UART/USART
外圍設備: 欠壓檢測/復位,HLVD,POR,PWM,WDT
輸入/輸出數(shù): 36
程序存儲器容量: 4KB(2K x 16)
程序存儲器類型: 閃存
EEPROM 大小: 256 x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 4.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 13x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-VQFN 裸露焊盤
包裝: 帶卷 (TR)
PIC18F2221/2321/4221/4321 FAMILY
DS39689F-page 106
2009 Microchip Technology Inc.
10.4
IPR Registers
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:
IPR1: PERIPHERAL INTERRUPT PRIORITY REGISTER 1
R/W-1
PSPIP(1)
ADIP
RCIP
TXIP
SSPIP
CCP1IP
TMR2IP
TMR1IP
bit 7
bit 0
bit 7
PSPIP: Parallel Slave Port Read/Write Interrupt Priority bit(1)
1 =High priority
0 = Low priority
Note 1: This bit is unimplemented on 28-pin devices and will read as ‘0’.
bit 6
ADIP: A/D Converter Interrupt Priority bit
1 =High priority
0 = Low priority
bit 5
RCIP: EUSART Receive Interrupt Priority bit
1 =High priority
0 = Low priority
bit 4
TXIP: EUSART Transmit Interrupt Priority bit
1 =High priority
0 = Low priority
bit 3
SSPIP: Master Synchronous Serial Port Interrupt Priority bit
1 =High priority
0 = Low priority
bit 2
CCP1IP: CCP1 Interrupt Priority bit
1 =High priority
0 = Low priority
bit 1
TMR2IP: TMR2 to PR2 Match Interrupt Priority bit
1 =High priority
0 = Low priority
bit 0
TMR1IP: TMR1 Overflow Interrupt Priority bit
1 =High priority
0 = Low priority
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
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