ST7263BE6 STMicroelectronics, ST7263BE6 Datasheet - Page 28
ST7263BE6
Manufacturer Part Number
ST7263BE6
Description
LOW SPEED USB 8-BIT MCU FAMILY WITH UP TO 32K FLASH/ROM, DFU CAPABILITY, 8-BIT ADC, WDG, TIMER, SCI and I2C
Manufacturer
STMicroelectronics
Datasheet
1.ST7263BH6.pdf
(186 pages)
Specifications of ST7263BE6
4, 8, 16 Or 32 Kbytes Program Memory
high density Flash (HDFlash), FastROM or ROM with Read-Out and Write protection
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Central processing unit
5
5.1
5.2
5.3
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Central processing unit
Introduction
This CPU has a full 8-bit architecture and contains six internal registers allowing efficient 8-
bit data manipulation.
Main features
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CPU registers
The six CPU registers shown in
accessed by specific instructions.
Accumulator (A)
The Accumulator is an 8-bit general purpose register used to hold operands and the results
of the arithmetic and logic calculations and to manipulate data.
Index registers (X and Y)
In indexed addressing modes, these 8-bit registers are used to create either effective
addresses or temporary storage areas for data manipulation. (The Cross-Assembler
generates a precede instruction (PRE) to indicate that the following instruction refers to the
Y register.)
The Y register is not affected by the interrupt automatic procedures (not pushed to and
popped from the stack).
Program Counter (PC)
The program counter is a 16-bit register containing the address of the next instruction to be
executed by the CPU. It is made of two 8-bit registers PCL (program counter low which is
the LSB) and PCH (program counter high which is the MSB).
63 basic instructions
Fast 8-bit by 8-bit multiply
17 main addressing modes
Two 8-bit index registers
16-bit stack pointer
Low power modes
Maskable hardware interrupts
Non-maskable software interrupt
Doc ID 7516 Rev 8
Figure
are not present in the memory mapping and are
ST7263Bxx
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