8051 microcontroller has program status register also know as flag register. Flag register is used to show status of arithmetic logic instructions like carry bit, zero carry bit etc. PSW is an 8 bit register. Only 6 bits are used. PSW register is also called flag register. Flag register has...
andmicrocontrollers:Microprocessor is a single chip CPU, microcontrollercontains, a CPU and much of the remaining circuitry of acomplete microcomputer system in a single chip.Microcontroller includes RAM, ROM, serial and parallelinterface, timer, interrupt schedule circuitry (in addition toCPU) in a ...
Internal/External Program Memory Boundary (Fast Mode) CLK ALE DISALE=0 ALE DISALE=1 PSEN P0 INTERNAL EXECUTION P0 SFR OUT SHORT PULSE EXTERNAL EXECUTION PCL OUT FLOAT DATA SAMPLED PCL OUT P2 P2 SFR OUT PCH OUT PCH OUT 15 3.1.2 SIG In addition to the 64K code space, the AT89LP51RD2...
To accomplish this, the external bus interface common to most 8051-based controllers is employed. 4.1 Accessing External Memory It is possible to distinguish between accesses to external program memory and external data memory or other peripheral components respectively. This distinction is made by ...
The TSC8051i2 is an 8-bit microcontroller, based on the market- leading 80C51 Intel architecture. In addition to standard UART it comprises a multi-master I2C controller, offering a cost effective solution to implement I2C based systems. With up to 12 programmable 8-bit PWM channels it ...
program download, making it easy to update and modify your projects. With two reset modes, power-on reset and 51/AVR double-key reset, you have the flexibility to manage your projects effectively. **Extensive Compatibility and Application Scenarios** The 8051 Development Board C51 USB ...
Program memory can be addressed using indexed addressing. The core registers are comprised of an accumulator, a stack pointer and dual data pointer registers in addition to the general registers. Data memory is split into internal and external RAM. The name "external RAM" is in fact misleading ...
Atmel 8051 Microcontroller Family - Product Selection Guide Device ON-CHIP MEMORY Flash (Bytes) EEPROM (Bytes) SRAM (Bytes) In-System Programmable (ISP) HARDWARE FEATURES I/O Pins Enhanced LED I/O Drivers SPI Port Full Duplex Serial UART Watchdog Timer Timer/Counters Analogue Comparator IDLE ...
It has the same instruction set as the 8051 family, with one addition: DEC DPTR (op-code A5H, the DPTR is decreased by 1). While the original 8051 family was designed to operate at 12 clock periods per machine cycle, the W77E58 operates at a much reduced clock rate of only 4 ...
In addition, the transition at T2EX causes bit EXF2 in T2CON to be set, and EXF2 like TF2 can generate an interrupt (which vectors to the same location as Timer 2 overflow interrupt. The Timer 2 interrupt service routine can interrogate TF2 and EXF2 to determine which event caused the ...