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参数资料
型号： PIC18F2221-E/SP
厂商： Microchip Technology
文件页数： 61/110页
文件大小： 0K
描述： IC PIC MCU FLASH 2KX16 28DIP
产品培训模块： Asynchronous Stimulus
标准包装： 15
系列： PIC® 18F
核心处理器： PIC
芯体尺寸： 8-位
速度： 25MHz
连通性： I²C，SPI，UART/USART
外围设备： 欠压检测/复位，HLVD，POR，PWM，WDT
输入/输出数： 25
程序存储器容量： 4KB（2K x 16）
程序存储器类型： 闪存
EEPROM 大小： 256 x 8
RAM 容量： 512 x 8
电压 - 电源 (Vcc/Vdd)： 4.2 V ~ 5.5 V
数据转换器： A/D 10x10b
振荡器型： 内部
工作温度： -40°C ~ 125°C
封装/外壳： 28-DIP（0.300"，7.62mm）
包装： 管件
配用： DVA18XP280-ND - DEVICE ADAPTER 18F2220 PDIP 28LD
PIC18F2221/2321/4221/4321 FAMILY
DS39689F-page 54
2009 Microchip Technology Inc.
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 oper-
ation. 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 5-3. These bits
are used in software to determine the nature of the
Reset.
Table 5-4 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.
TABLE 5-3:
STATUS BITS, THEIR SIGNIFICANCE AND THE INITIALIZATION CONDITION
FOR RCON REGISTER
Condition
Program
Counter
RCON Register
STKPTR Register
RI
TO
PD
POR BOR STKFUL
STKUNF
Power-on Reset
0000h
11
100
0
RESET Instruction
0000h
0u
uuu
u
Brown-out
0000h
11
1u0
u
MCLR during power-managed Run modes
0000h
u1
uuu
u
MCLR during power-managed Idle modes
and Sleep mode
0000h
u1
0uu
u
WDT Time-out during full power or
power-managed Run mode
0000h
u0
uuu
u
MCLR during full power execution
0000h
uu
uuu
u
Stack Full Reset (STVREN = 1)
0000h
uu
uuu
1
u
Stack Underflow Reset (STVREN = 1)
0000h
uu
uuu
u
1
Stack Underflow Error (not an actual Reset,
STVREN = 0)
0000h
uu
uuu
u
1
WDT time-out during power-managed Idle or
Sleep modes
PC + 2
u0
0uu
u
Interrupt exit from power-managed modes
PC + 2(1)
uu
0uu
u
Legend: u = unchanged
Note 1:
When the wake-up is due to an interrupt and the GIEH or GIEL bits are set, the PC is loaded with the
interrupt vector (008h or 0018h).
2:
Reset state is ‘1’ for POR and unchanged for all other Resets when software BOR is enabled
(BOREN<1:0> Configuration bits = 01 and SBOREN = 1); otherwise, the Reset state is ‘0’.
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相关代理商/技术参数
参数描述
PIC18F2221-I/ML 功能描述:8位微控制器 -MCU 4 KB Flash 512 RAM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F2221-I/SO 功能描述:8位微控制器 -MCU 4 KB Flash 512 RAM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F2221-I/SO 制造商:Microchip Technology Inc 功能描述:8-Bit Microcontroller IC
PIC18F2221-I/SP 功能描述:8位微控制器 -MCU 4 KB Flash 512 RAM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F2221-I/SP 制造商:Microchip Technology Inc 功能描述:8-Bit Microcontroller IC
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