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参数资料
| 型号： | PIC18F448-E/P |
| 厂商： | Microchip Technology |
| 文件页数： | 72/116页 |
| 文件大小： | 0K |
| 描述： | IC MCU FLASH 8KX16 W/CAN 40-DIP |
| 产品培训模块： | Asynchronous Stimulus |
| 标准包装： | 10 |
| 系列： | PIC® 18F |
| 核心处理器： | PIC |
| 芯体尺寸： | 8-位 |
| 速度： | 40MHz |
| 连通性： | CAN，I²C，SPI，UART/USART |
| 外围设备： | 欠压检测/复位，LVD，POR，PWM，WDT |
| 输入/输出数： | 33 |
| 程序存储器容量： | 16KB（8K x 16） |
| 程序存储器类型： | 闪存 |
| EEPROM 大小： | 256 x 8 |
| RAM 容量： | 768 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 4.2 V ~ 5.5 V |
| 数据转换器： | A/D 8x10b |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 40-DIP（0.600"，15.24mm） |
| 包装： | 管件 |
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2006 Microchip Technology Inc.
DS41159E-page 57
PIC18FXX8
4.13
Status Register
The Status register, shown in Register 4-2, contains the
arithmetic status of the ALU. The Status register can be
the destination for any instruction, as with any other
register. If the Status register is the destination for an
instruction that affects the Z, DC, C, OV or N bits, then
the write to these five bits is disabled. These bits are set
or cleared according to the device logic. Therefore, the
result of an instruction with the Status register as
destination may be different than intended.
For example, CLRF STATUS will clear the upper three
bits and set the Z bit. This leaves the Status register as
000u u1uu
(where u = unchanged).
It is recommended, therefore, that only BCF, BSF,
SWAPF,
MOVFF
and MOVWF instructions are used to
alter the Status register, because these instructions do
not affect the Z, C, DC, OV or N bits from the Status
register. For other instructions which do not affect the
status bits, see Table 25-2.
REGISTER 4-2:
STATUS REGISTER
Note:
The C and DC bits operate as a Borrow
and Digit
Borrow bit respectively, in
subtraction.
U-0
R/W-x
—
—N
OV
Z
DC
C
bit 7
bit 0
bit 7-5
Unimplemented: Read as ‘0’
bit 4
N: Negative bit
This bit is used for signed arithmetic (2’s complement). It indicates whether the result of the ALU
operation was negative (ALU MSb = 1).
1
= Result was negative
0
= Result was positive
bit 3
OV: Overflow bit
This bit is used for signed arithmetic (2’s complement). It indicates an overflow of the 7-bit
magnitude which causes the sign bit (bit 7) to change state.
1
= Overflow occurred for signed arithmetic (in this arithmetic operation)
0
= No overflow occurred
bit 2
Z: Zero bit
1
= The result of an arithmetic or logic operation is zero
0
= The result of an arithmetic or logic operation is not zero
bit 1
DC: Digit Carry/Borrow bit
For ADDWF, ADDLW, SUBLW and SUBWF instructions:
1
= A carry-out from the 4th low-order bit of the result occurred
0
= No carry-out from the 4th low-order bit of the result
Note:
For Borrow, the polarity is reversed. A subtraction is executed by adding the 2’s
complement of the second operand. For rotate (RRCF, RRNCF, RLCF and RLNCF)
instructions, this bit is loaded with either bit 4 or bit 3 of the source register.
bit 0
C: Carry/Borrow bit
For ADDWF, ADDLW, SUBLW and SUBWF instructions:
1
= A carry-out from the Most Significant bit of the result occurred
0
= No carry-out from the Most Significant bit of the result occurred
Note:
For Borrow, the polarity is reversed. A subtraction is executed by adding the 2’s
complement of the second operand. For rotate (RRF, RLF) instructions, this bit is
loaded with either the high or low-order bit of the source register.
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| PIC18F448-I/L | 功能描述:8位微控制器 -MCU 16KB 768 RAM 34 I/O 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 |
| PIC18F448-I/L | 制造商:Microchip Technology Inc 功能描述:IC 8BIT FLASH MCU CAN ADC 18F448 |
| PIC18F448-I/P | 功能描述:8位微控制器 -MCU 16KB 768 RAM 34 I/O 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 |
| PIC18F448-I/P | 制造商:Microchip Technology Inc 功能描述:IC 8BIT FLASH MCU CAN ADC 18F448 |
| PIC18F448-I/PT | 功能描述:8位微控制器 -MCU 16KB 768 RAM 34 I/O 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 |
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