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Additional copies of this document or other Intel literature maybe obtained from: Intel Corporation. Literature , and 80C51 Hardware. Description. The Intel AH is a MCS NMOS single-chip 8-bit microcontroller with 32 I/O lines, 2 Timers/Counters, Instruction Set Manual for the Intel AH. The MCS 51 CHMOS microcontroller products are fabricated on Intel’s reliable AN80C51 indicates an automotive temperature range version of the 80C51 in a.

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The success of the Intel spawned a number of clones, which are collectively referred to as the MCS family of microcontrollers, which includes chips from vendors such as Atmel, Philips, Infineon, and Texas Instruments. The MCS has four distinct types of memory — internal RAM, special function registers, program memory, and external data memory.

80C51 Microcontrollers | Tekmos Inc.

JNB bitoffset jump if bit clear. ANL Adata. MOV Cbit. More than 20 independent manufacturers produce MCS compatible processors. It may be on- or off-chip, depending on the particular model of chip being used. Archived from the original on 30 May This means that there are essentially 32 available general purpose registers, although only 8 one bank can be directly accessed at a time.


One operand is flexible, while the second if any is specified by the operation: Set when addition produces a carry from bit 3 to bit inetl.

ANL Cbit. Retrieved 6 January Retrieved from ” https: This part was available in a ceramic package with a clear quartz window over the top of the die so UV light could be used to erase the EPROM memory. Archived from the original on CJNE Adata,offset. For the former, the most significant bit of the accumulator can be addressed directly, as it is a bit-addressable SFR.

Intel MCS-51

Single-board microcontroller Special function register. Some derivatives integrate a digital signal processor DSP.

Inte are various high-level programming language compilers for the The B register is used in a similar manner, except that it can receive the extended answers from the multiply and divide operations.

All Silicon Labssome Dallas and a few Atmel devices have single cycle cores. The A register is called the accumulatorand by default it receives the result of all arithmetic operations. This is “program store enable”.


Intel MCS – Wikipedia

We will deal with this in depth in the later chapters. May be read and written by software; not nitel affected by hardware. The A and B registers can store up to 8-bits of data each. Pins 40 and 20 are VCC and ground respectively. RLC A rotate left through carry.

The low-order bit of the register bank. The MCS family was also discontinued by Intel, but is widely available in intrl compatible and partly enhanced variants.

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Register select 1, RS1. JZ offset jump if zero.

ORL Cbit. ADD Adata.

Pin should be held high for 2 machine cycles. Therefore one machine cycle is 12 T-states.