KL5KUSB116 Просмотр технического описания (PDF) - KAWASAKI MICROELECTRONICS

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KL5KUSB116

USB to Serial

KAWASAKI MICROELECTRONICS 

KL5KUSB116

USB to Serial

Function Description

16 Bit Processor

The integrated 16 bit processor serves as a micro controller for USB peripherals. The processor

can execute approximately five million instructions per second. With this processing power it

allows the design of intelligent peripherals that can process data prior to passing it on to the host

PC, thus improving overall performance of the system. The masked ROM in the this device or

external memory contains a specialized instruction set that has been designed for highly efficient

coding of processing algorithms and USB transaction processing.

The 16-bit processor is designed for efficient data execution by having direct access to the RAM

Buffer, external memory, I/O interfaces, and all the control and status registers

The processor supports prioritized vectored hardware interrupts and has as many as 240

software interrupt vectors.

The processor provides six addressing modes, supporting memory-to-memory, memory-to-

register, register-to-register, immediate-to-register or immediate-to-memory operations. Register,

direct, immediate, indirect, and indirect indexed addressing modes are supported. In addition,

there is an auto-increment mode in which a register, used as an address pointer is automatically

incremented after each use, making repetitive operations more efficient both from a programming

and a performance standpoint.

The processor features a full set of program control, logical, and integer arithmetic instructions.

All instructions are sixteen bits wide, although some instructions require operands, which may

occupy another one or two words. Several special “ short immediate” instructions are available,

so that certain frequently used operations with small constant operand will fit into a 16-bit

instruction.

The Processor – Divide/Multiply function

The processor’s divide/multiply function contains all the instructions of the base processor that

additionally includes integer divide and multiply instructions. A signed multiply instructions takes

two 16-bit operands and returns a 32-bit result. A signed divide instruction divides a 32-bit

operand by a 16-bit operand.

RAM Buffer

The USB controller contains internal buffer memory. The memory is used to buffer data and USB

packets and accessed by the 16 Bit processor and the SIE. USB transactions are automatically

routed to the memory buffer. The 16-bit processor has the ability to set up pointers and block

sizes in buffer memory for USB transactions. Data is read from the interface and is processed

and packetized by the 16-bit I/O processor.

Kawasaki LSI • 2570 North First Street • Suite 301 • San Jose, CA 95131 • Tel: (408) 570-0555 • Fax: (408) 570-0567 • www.klsi.com

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