The
Western Design Center
The Western Design Center (WDC), located in Mesa, Arizona, is a company that develops intellectual property for, and licenses manufacture of, MOS Technology 65xx based microprocessors and microcontrollers. WDC was founded in 1978 by a former ...
(WDC) W65C265S is a 16-bit CMOS
microcontroller
A microcontroller (MC, uC, or μC) or microcontroller unit (MCU) is a small computer on a single integrated circuit. A microcontroller contains one or more CPUs (processor cores) along with memory and programmable input/output peripherals. Pro ...
based on a
W65C816S processor core, which is a superset of the
MOS Technology 6502
The MOS Technology 6502 (typically pronounced "sixty-five-oh-two" or "six-five-oh-two") William Mensch and the moderator both pronounce the 6502 microprocessor as ''"sixty-five-oh-two"''. is an 8-bit computing, 8-bit microprocessor that was desi ...
processor.
The W65C265S consists of a fully static
W65C816S CPU
A central processing unit (CPU), also called a central processor, main processor, or just processor, is the primary processor in a given computer. Its electronic circuitry executes instructions of a computer program, such as arithmetic, log ...
core, 8
KB of
ROM
Rom, or ROM may refer to:
Biomechanics and medicine
* Risk of mortality, a medical classification to estimate the likelihood of death for a patient
* Rupture of membranes, a term used during pregnancy to describe a rupture of the amniotic sac
* ...
containing a
machine language monitor
A machine code monitor ( machine language monitor) is software that allows a user to enter commands to view and change memory locations on a computer, with options to load and save memory contents from/to secondary storage. Some full-featured ma ...
, 576
bytes
The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable un ...
of
SRAM, a
processor cache
A CPU cache is a hardware cache used by the central processing unit (CPU) of a computer to reduce the average cost (time or energy) to access data from the main memory. A cache is a smaller, faster memory, located closer to a processor core, which ...
under software control, eight 16-bit timers with maskable interrupts, an interrupt-driven
parallel bus
In data transmission, parallel communication is a method of conveying multiple binary digits ( bits) simultaneously using multiple conductors. This contrasts with serial communication, which conveys only a single bit at a time; this distinction ...
(PIB), four
universal asynchronous receiver-transmitter
A universal asynchronous receiver-transmitter (UART ) is a peripheral device for asynchronous serial communication in which the data format and transmission speeds are configurable. It sends data bits one by one, from the least significant to ...
s (UARTs), a
watchdog timer
A watchdog timer (WDT, or simply a ''watchdog''), sometimes called a ''computer operating properly timer'' (''COP timer''), is an electronic or software timer that is used to detect and recover from computer malfunctions. Watchdog timers are wide ...
that fires a restart interrupt, twenty-nine priority encoded interrupts, a time-of-day clock, two sound generators, a 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.
Features
* Hi-Rel low power CMOS process
* Operating
ambient temperature
Room temperature, colloquially, denotes the range of air temperatures most people find comfortable indoors while dressed in typical clothing. Comfortable temperatures can be extended beyond this range depending on humidity, air circulation, and ...
range is 0 °C to +70 °C
* Single 2.8 V to 5.5 V power supply
* Static to 8 MHz clock operation, as well as 32.768KHz capability
*
W65C816S compatible CPU
* 16
MB 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
* Automatically shifts speed for slow memory or peripherals
See also
*
WDC 65C134 - an 8-bit microcontroller based around a
WDC 65C02
The Western Design Center (WDC) 65C02 microprocessor is an enhanced CMOS version of the popular nMOS-based 8-bit MOS Technology 6502. It uses less power than the original 6502, fixes several problems, and adds new instructions and addressing ...
processor core
References
Further reading
External links
W65C265S website- Western Design Center (WDC)
W65C265S datasheet- WDC
W65C265S monitor ROM manual- WDC
65xx microprocessors
16-bit microprocessors
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