參數(shù)資料
型號: XC866L-4FR
廠商: INFINEON TECHNOLOGIES AG
元件分類: 8位微控制器
英文描述: 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述: 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數(shù): 16/108頁
文件大小: 979K
代理商: XC866L-4FR
XC866
Functional Description
Data Sheet
12
V1.0, 2006-02
3
Functional Description
3.1
Processor Architecture
The XC866 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 XC866 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 an additional wait state (one machine cycle). The
instruction set consists of 45% one-byte, 41% two-byte and 14% three-byte instructions.
The XC866 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 SFRs.
Figure 5
shows the CPU functional blocks.
Figure 5
CPU Block Diagram
Register Interface
ALU
UART
Core SFRs
16-bit Registers &
Memory Interface
Opcode Decoder
State Machine &
Power Saving
Interrupt
Controller
Multiplier / Divider
Opcode &
Immediate
Registers
Timer 0 / Timer 1
Internal Data
Memory
External SFRs
External Data
Memory
Program Memory
f
CCLK
Memory Wait
Reset
Legacy External Interrupts (IEN0, IEN1)
External Interrupts
Non-Maskable Interrupt
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