參數(shù)資料
型號: PIC18F4431-E/P
廠商: Microchip Technology
文件頁數(shù): 67/119頁
文件大?。?/td> 0K
描述: IC MCU FLASH 8KX16 40DIP
產(chǎn)品培訓模塊: Asynchronous Stimulus
標準包裝: 10
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(shè)備: 欠壓檢測/復(fù)位,LVD,電源控制 PWM,QEI,POR,PWM,WDT
輸入/輸出數(shù): 36
程序存儲器容量: 16KB(8K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量: 768 x 8
電壓 - 電源 (Vcc/Vdd): 4.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 9x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
配用: DVA18XP400-ND - DEVICE ADAPTER 18F4220 PDIP 40LD
ACICE0206-ND - ADAPTER MPLABICE 40P 600 MIL
2010 Microchip Technology Inc.
DS39616D-page 51
PIC18F2331/2431/4331/4431
5.6
Reset State of Registers
Most registers are unaffected by a Reset. Their status
is unknown on POR and unchanged by all other
Resets. The other registers are forced to a “Reset
state” depending on the type of Reset that occurred.
Most registers are not affected by a WDT wake-up,
since this is viewed as the resumption of normal
operation.
Status bits from the RCON register (RI, TO, PD, POR
and BOR) are set or cleared differently in different
Reset situations, as indicated in Table 5-2. These bits
are used in software to determine the nature of the
Reset.
Table 5-3 describes the Reset states for all of the
Special Function Registers. These are categorized by
Power-on and Brown-out Resets, Master Clear and
WDT Resets, and WDT wake-ups.
FIGURE 5-3:
TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD, VDD RISE < TPWRT)
FIGURE 5-4:
TIME-OUT SEQUENCE ON POWER-UP (MCLR NOT TIED TO VDD): CASE 1
TPWRT
TOST
VDD
MCLR
INTERNAL POR
PWRT TIME-OUT
OST TIME-OUT
INTERNAL RESET
TPWRT
TOST
VDD
MCLR
INTERNAL POR
PWRT TIME-OUT
OST TIME-OUT
INTERNAL RESET
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