在单片机的内部RAM中，哪些字节有位地址？特殊功能寄存器SFR中哪些可以位寻址？位寻址功能有什么好处？_百度知道
在单片机的内部RAM中，哪些字节有位地址？特殊功能寄存器SFR中哪些可以位寻址？位寻址功能有什么好处？
提问者采纳
P3、SCON，占用内存空间小：ACC、P0；另外位寻址指令都是单周期指令。使用位寻址的最大好处就是可以单独对某一位操作而不影响其他位的状态、P2，下列特殊功能寄存器可以位寻址、P1、IP、TCON、TMOD、IE、PSW在MCS51单片机中，执行速度快
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其他1条回答
SCON、P2、B 、A、IP、P1、IE，20H~2FH这16个字节有位地址、TCON、P3：P0，特殊功能寄存器SFR中可以位寻址的寄存器有在单片机的内部RAM中、PSW
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出门在外也不愁STM8L051F3 Ultra-low-power 8-bit MCU with 8 Kbytes Flash, 16 MHz CPU, integrated EEPROM_BDTIC 代理STM8L051F3
STM8L051F3 Ultra-low-power 8-bit MCU with 8 Kbytes Flash, 16 MHz CPU, integrated EEPROM
The low density value line STM8L05xxx devices are members of the STM8L ultra low
power 8-bit family.
The value line STM8L05xxx ultra low power family
features an enhanced STM8 CPU core providing increased processing power (up to
16 MIPS at 16 MHz) while maintaining the advantages of a CISC architecture with
improved code density, a 24-bit linear addressing space and an optimized
architecture for low power operations.
The family includes an integrated
debug module with a hardware interface (SWIM) which allows non-intrusive
In-Application debugging and ultra-fast Flash programming.
Low density
value line STM8L05xxx microcontrollers feature embedded data EEPROM and low
power, low-voltage, single-supply program Flash memory.
The devices
incorporate an extensive range of enhanced I/Os and peripherals, a 12-bit ADC, a
real-time clock, two 16-bit timers, one 8-bit timer, as well as standard
communication interfaces such as an SPI, an I?C interface, and one
The modular design of the peripheral set allows the same
peripherals to be found in different ST microcontroller families including
32-bit families. This makes any transition to a different family very easy, and
simplified even more by the use of a common set of development tools.
All value line STM8L ultra low power products are based on the same
architecture with the same memory mapping and a coherent pinout
Operating conditions
Operating power supply: 1.8 V to 3.6 V Temperature range: -40 °C to 85 °C
Low power features
5 low power modes: Wait, Low power run (5.1 μA), Low power wait (3 μA),
Active-halt with RTC (1.3 μA), Halt (350 nA)
Ultra-low leakage per I/0: 50 nA
Fast wakeup from Halt: 5 μs
Advanced STM8 core
Harvard architecture and 3-stage pipeline
Max freq: 16 MHz, 16 CISC MIPS peak
Up to 40 external interrupt sources
Reset and supply management
Low power, ultra-safe BOR reset with 5 selectable thresholds
Ultra low power POR/PDR
Programmable voltage detector (PVD)
Clock management
32 kHz and 1 to 16 MHz crystal oscillators
Internal 16 MHz factory-trimmed RC
Internal 38 kHz low consumption RC
Clock security system
Low power RTC
BCD calendar with alarm interrupt
Digital calibration with +/- 0.5 ppm accuracy
LSE security system
Auto-wakeup from Halt w/ periodic interrupt
8 Kbytes of Flash program memory and 256 bytes of data EEPROM with ECC
Flexible write and read protection modes
1 Kbyte of RAM
4 channels supporting ADC, SPI, I?C, USART, timers
1 channel for memory-to-memory
12-bit ADC up to 1 Msps/28 channels
Internal reference voltage
Two 16-bit timers with 2 channels (used as IC, OC, PWM), quadrature encoder
One 8-bit timer with 7-bit prescaler
2 watchdogs: 1 Window, 1 Independent
Beeper timer with 1, 2 or 4 kHz frequencies
Communication interfaces
Synchronous serial interface (SPI)
Fast I?C 400 kHz SMBus and PMBus
Up to 18 I/Os, all mappable on interrupt vectors
Development support
Fast on-chip programming and non-intrusive debugging with SWIM
Bootloader using USART
STM8L051F3 订购信息
STM8L051F3P6
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<td x:num="
-40 °C-85 °C
STM8L051F3P6
STM8L051F3P6TR
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Tape And Reel
-40 °C-85 °C
STM8L051F3P6TR
: DS9178: Value Line, 8-bit ultralow power MCU, 8-KB Flash, 256-byte data EEPROM,
RTC, timers, USART, I?C, SPI, ADC
DATA BRIEF
: Value line, 8-bit ultralow power MCU, 8-KB Flash, 256-byte data EEPROM,
RTC, timers, USART, I?C, SPI, ADC
APPLICATION NOTES
: STM8L family power management
: STM8 I簡C optimized examples
: Soldering recommendations and package information for Lead-free ECOPACK(R) microcontrollers
: Software techniques for improving microcontroller EMC performance
: Precision improvement techniques for the A/D converter of the STM8 microcontroller
: Migration and compatibility guidelines for STM8L microcontroller
applications
: Guidelines for designing touch sensing applications
: EMC design guide for ST microcontrollers
: Electrostatic discharge sensitivity measurement
ERRATA SHEETS
: Device limitations for STM8AFxxxx automotive MCUs featuring up to 128
Kbytes of Flash program memory
LICENSE AGREEMENTS
PROGRAMMING MANUALS
: STM8 CPU programming manual
: How to program STM8L Flash program memory and data EEPROM
REFERENCE MANUALS
: STM8L05xx, STM8L15xx and STM8L16xx microcontroller family
TECHNICAL NOTES
: STM8 bootloader frequently asked questions
PRODUCT PRESENTATIONS
BOARDS AND TOOLS
Part Number
STM Studio run-time variables monitoring and visualization tool
ST Visual Programmer for programming ST7, STM8, STM8T and STM32
Low-cost demonstration board for STM8L (32KB flash) Low Power MCUs
Connection Adapter to use with STICE-SYS00x emulation systems
In-circuit debugger and programmer for STM8 and STM32 MCUs; with IAR EWARM and Keil RVMDK and ST toolset
EvoPrimer components to build your own EvoPrimer for easy evaluation and development with STM32 and STM8 MCUs
Discovery kit for the STM8L EnergyLite 8-bit MCUs
Complete EvoPrimer ready to use from Raisonance for easy evaluation and development with STM8L MCUs
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32
ST Visual develop IDE for developing ST7 and STM8 applications
Full-featured emulator offers flexible, modular debugging and programming solution
In-circuit debugger/programmer supporting JTAG and ICC protocols for STM8, ST7, uPSD, STM32, STR7 and STR9 microcontrollers
Evaluation board for STM8L15x/16x (32KB flash) ErnergyLite 8-bit MCUs
DEVICE PROGRAMMERS
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