Western Design Center 65816
The W65C816S even 65C816 or 65816 called, is a 1983 imagined 16-bit - microprocessor , developed by the Western Design Center (WDC). The W65C265S was derived from this as a microcontroller .
microprocessor
The microprocessor was developed as an expanded and compatible successor to the MOS Technology 6502 . It has two index registers , a stack pointer , a direct page register and a 24-bit address bus . As a static CMOS circuit, apart from its compatibility with the 6502, it is characterized by a low power consumption of 300 µA at 1 MHz (corresponds to approx. 1 mW at a voltage of 3.3 V) and a high level of interference immunity.
Microcontroller
In contrast to most other microcontrollers, the W65C265S has the entire address and data bus routed to the outside. This means that the entire address range can also be addressed outside of the controller. In addition, it has 8 KB of mask-programmable ROM , 576 byte RAM , 2 tone generators, 64 I / O ports, 4 interruptible UARTs , 8 timers / counters. The internal ROM can also be accessed via DMA .
Mainly using the CPU
- in the Apple II GS (2.8 MHz, in accelerator cards up to 14 MHz)
- in the game console Super Famicom / Super Nintendo (3.58 MHz)
- in the SuperCPU accelerators (20 MHz), as well as Flash 8 (8 MHz) for Commodore 64 and 128
- in the Acorn Communicator (2.0 MHz)
literature
- David Eyes, Ron Lichty: Programming the 65816: Including the 6502, 65C02, and 65802 . Brady / Prentice Hall, New York 1986, ISBN 0-89303-789-3 . ( E-book of the title on Western Design Centers Documentation page ; PDF; 1.8 MB)
- Leo J. Scanlon: Apple IIGS assembly language programming . Bantam Books, Toronto 1987, ISBN 0-553-34395-5 .
Individual evidence
- ↑ Data sheet W65C265S (pdf; 1.2 MB)
Web links
- Western Design Center - Manufacturer (English) including data sheet