KL5KUSB110 Просмотр технического описания (PDF) - KAWASAKI MICROELECTRONICS

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KL5KUSB110

USB to ATAPI

KAWASAKI MICROELECTRONICS 

K KAWASAKI

LSI

Preliminary

USB to ATAPI

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.

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. Memory buffer can also be configured as “Double

port buffer” multiple sector data buffer, 512 bytes or 1024 bytes simultaneously transferred from

Disk to USB port and via versa

ROM

3Kx16 internal Mask BIOS ROM, supports USB to ATAPI/IDE macros, USB functions, serial

EEPROM programmability, DRAM, UART, and other functions. Executable code can run from

either internal RAM, ROM, or external ROM. Also, available extended external SRAM or DRAM

to store disk cash data.

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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