saf-xc866-4rri3v Infineon Technologies Corporation, saf-xc866-4rri3v Datasheet - Page 18
saf-xc866-4rri3v
Manufacturer Part Number
saf-xc866-4rri3v
Description
8-bit Single-chip Microcontroller
Manufacturer
Infineon Technologies Corporation
Datasheet
1.SAF-XC866-4RRI3V.pdf
(116 pages)
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3
3.1
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
Figure 5
Data Sheet
Legacy External Interrupts (IEN0, IEN1)
shows the CPU functional blocks.
Functional Description
Processor Architecture
Non-Maskable Interrupt
CPU Block Diagram
Program Memory
External Interrupts
External Data
Memory Wait
Memory
Reset
f
CCLK
16-bit Registers &
Memory Interface
Opcode Decoder
State Machine &
Power Saving
Core SFRs
Immediate
Opcode &
Controller
Registers
Interrupt
14
Register Interface
Multiplier / Divider
Timer 0 / Timer 1
UART
ALU
Functional Description
External SFRs
Internal Data
V1.2, 2007-10
Memory
XC866
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