XC886/888CLM
Processor Architecture
User’s Manual
2-1
V1.3, 2010-02
Processor Architecture, V 1.0
2
Processor Architecture
The XC886/888 is based on a high-performance 8-bit Central Processing Unit (CPU)
that is compatible with the standard 8051 processor. While the standard 8051 processor
is designed around a 12-clock machine cycle, the XC886/888 CPU uses a 2-clock
machine cycle. This allows fast access to ROM or RAM memories without wait state.
Access to the Flash memory, however, requires one wait state (one machine cycle).
See
. The instruction set consists of 45% one-byte, 41% two-byte and 14%
three-byte instructions.
The XC886/888 CPU provides a range of debugging features, including basic stop/start,
single-step execution, breakpoint support and read/write access to the data memory,
program memory and Special Function Registers (SFRs).
Features
•
Two clocks per machine cycle architecture (for memory access without wait state)
•
Wait state support for Flash memory
•
Program memory download option
•
15-source, 4-level interrupt controller
•
Two data pointers
•
Power saving modes
•
Dedicated debug mode and debug signals
•
Two 16-bit timers (Timer 0 and Timer 1)
•
Full-duplex serial port (UART)
2.1
Functional Description
shows the CPU functional blocks. The CPU consists of the instruction
decoder, the arithmetic section, and the program control section. Each program
instruction is decoded by the instruction decoder. This instruction decoder generates
internal signals that control the functions of the individual units within the CPU. The
internal signals have an effect on the source and destination of data transfers and control
the arithmetic/logic unit (ALU) processing.
*
Содержание XC886CLM
Страница 1: ...User s Manual V1 3 2010 02 Microcontrollers 8 Bit XC886 888CLM 8 Bit Single Chip Microcontroller...
Страница 3: ...User s Manual V1 3 2010 02 Microcontrollers 8 Bit XC886 888CLM 8 Bit Single Chip Microcontroller...
Страница 324: ...XC886 888CLM Serial Interfaces User s Manual 12 52 V1 3 2010 02 Serial Interfaces V 1 0...
Страница 663: ...w w w i n f i n e o n c o m Published by Infineon Technologies AG...