The Western Design Center (WDC)

Western Design Center

The Western Design Center , located in Mesa, Arizona, USA, is a company developing and manufacturing MOS 65xx-based microprocessors, microcontrollers , and related support chips...

 W65C265S microcomputer is a complete fully static 16-bit

Bit

A bit is the basic unit of information in computing and telecommunications; it is the amount of information stored by a digital device or other physical system that exists in one of two possible distinct states...

 computer fabricated on a single chip using a Hi-Rel low power CMOS

CMOS

Complementary metal–oxide–semiconductor is a technology for constructing integrated circuits. CMOS technology is used in microprocessors, microcontrollers, static RAM, and other digital logic circuits...

 process. The W65C265S complements an established and growing line of 65xx products and has a wide range of microcomputer applications. The W65C265S has been developed for Hi-Rel applications and where minimum power is required.

The W65C265S consists of a W65C816S (Static) Central Processing Unit (CPU), 8 kB

Kilobyte

The kilobyte is a multiple of the unit byte for digital information. Although the prefix kilo- means 1000, the term kilobyte and symbol KB have historically been used to refer to either 1024 bytes or 1000 bytes, dependent upon context, in the fields of computer science and information...

 of Read Only Memory (ROM), 576 bytes of Random Access Memory (RAM), Processor defined cache under software control, eight 16-bit timers with maskable interrupts, high performance interrupt-driven Parallel Interface Bus (PIB), four Universal Asynchronous Receivers and Transmitters (UART) with baud rate timers, Monitor "Watch Dog" Timer with "restart" interrupt, twenty-nine priority encoded interrupts, Built-in Emulation features, Time of Day (ToD) clock features, Twin Tone Generators (TGx), Bus Control Register (BCR) for external memory bus control, interface circuitry for peripheral devices, ABORT input for low cost virtual memory interface, and many low power features.

The innovative architecture and demonstrated high performance of the W65C265S CPU, as well as instruction simplicity, result in system cost-effectiveness and a wide range of computational power. These features make the W65C265S a leading candidate for 16-bit microcomputer applications especially where task oriented processing is desired.

This product description assumes that the reader is familiar with the W65C816S CPU hardware and programming capabilities. Refer to the W65C816S Data Sheet for additional information.

Features of the W65C265S

• Hi-Rel low power CMOS process
• Operating ambient temperature = 0 ºC to +70 ºC
• Single 2.8 V to 5.5 V power supply
• Static to 8 MHz clock operation
• W65C816S compatible CPU
• Single chip microcomputer
• 16 MB
  Megabyte
  The megabyte is a multiple of the unit byte for digital information storage or transmission with two different values depending on context: bytes generally for computer memory; and one million bytes generally for computer storage. The IEEE Standards Board has decided that "Mega will mean 1 000...
  
  linear address space
• Twenty-nine priority encoded interrupts
• Four UARTS's
• Time of Day (ToD) clock features
• 8 x 16 bit timer/counters
• Bus Control Register
• Many bus operating features and modes
• 8 Programmable chip select outputs
• Low cost surface mount 84 and 100 lead packages
• Macro and Cross assemblers available
• C compilers available
• Automatically shifts speed for slow memory or peripherals

External links

• The Complete W65C265S Datasheet