AX68004LF datasheet(24/57 Pages) ASIX

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AX6800x

2/4-Port USB KVM Switch SoC

2.3 CPU Core and Debugger

2.3.1 CPU Core

The 1T 8051/80390 CPU core of AX6800x is an ultra-high performance, speed optimized, 8-bit embedded

controller dedicated for operation with fast on-chip memories. The CPU core has been designed with a special

concern about performance to power consumption ratio. The CPU core is 100% binary-compatible with the

industry standard 8051 8-bit micro-controller. The CPU core can address up to 128K bytes of linear program

space. The CPU core has Pipelined RISC architecture, which can be 10 times faster compared to standard

architecture and executes 96 million instructions per second when operating in 96Mhz.

The main features of 1T 8051/80390 CPU core are listed below:



100% software compatible with industry standard 8051



Maximum operating clock frequency of 96M Hz



Pipelined RISC architecture enables to execute instructions 10 times faster compared to standard 8051



20-bit FLAT program addressing mode – 80C390 instructions set



16-bit LARGE program addressing mode – 80C51 instructions set



24 times faster multiplication



12 times faster addition



256 bytes of internal (on-chip) Data Memory



Up to 128K bytes of Program Memory



On-chip SRAM used for mirrored program: 0 to 8K bytes



On-chip Flash memory used for program: 0 to 128K bytes in FLAT mode



Up to 32K bytes of External Data Memory(xDATA)



User programmable Program Memory wait states

2.3.2 Debugger

The Debugger inside AX6800x provides an in-circuit emulator feature and it is used to connect to an external

In-Circuit-Emulation (ICE) adaptor board, which manages communication between the Debugger inside

AX6800x and the Debug Software on a PC. The Hardware Assisted Debugger (HAD2) is the ICE adaptor board

that manages communication between the Debugger inside AX6800x and an USB port of the host PC running

Debug Software.

The Debug Software is a Windows based application. It is fully compatible with all existing 8051/80390 C

compilers and Assemblers. The Debug Software allows user to work in two major modes: software simulator

mode and hardware debugger mode. Those two modes assure software validation in simulation mode and then

real-time debugging of developed software inside AX6800x using debugger mode. Once loaded, the program may

be observed in Source Window, run at full-speed, single stepped by machine or C level instructions, or stopped at

any of the breakpoints.

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