SL8X305 Microcontroller Legacy Device: Philips/Signetics S8X305 FEATURES • Fetch, Decode, and Execute a 16-bit Instruction in a minimum of 200ns (one machine cycle) • Bit-oriented instruction set (addressable single– or multiple-bit subfields) • Separate buses for instruction, instruction Address and 3– State I/O • Thirteen 8-bit general-purpose working registers • Source/destination architecture • Bipolar low-power Schottky technology/TTL inputs and outputs • On–chip oscillator and timing generation • Single +5V supply • Multiple package options PRODUCT DESCRIPTION The Signetics 8X305 Microcontroller (Figure 1) is a high–speed bipolar microprocessor implemented with low–power Schottky technology. In a single chip, the 8X305 combines speed, flexibility, and a bit–oriented instruction set. These features and other basic characteristics of the chip combine to provide cost–effective solutions for a broad range of applications. The 8X305 is particularly useful in systems that require high–speed bit manipulations — sophisticated controllers, data communications, very fast interface control, and other applications of a similar nature. The 8X305 can fetch, decode, and execute a 16-bit instruction word in a minimum of 200ns. Within one instruction cycle, the 8-bit data-processing path can be programmed to rotate, mask, shift, and/or merge single or multiple bit subfields and, in addition, perform an ALU operation; in the same instruction, an external data field can be input, processed, and output to a specified destination — likewise, single or multiple bit data fields can be internally moved from a given source to a given destination. To summarize, fixed or variable-length data fields can be fetched, processed, operated on by the ALU, and moved to a different location — all in a timeframe of 200ns. To interface with I/O and program memory, the 8X305 uses a 13-bit instruction bus, an 8-bit bidirectional multiplexed I/O data/address bus and a 5-bit I/O control bus. A wide selection of I/O devices, interface chips, and specialpurpose parts are available for systems use. In most applications, the more powerful 8X305 is functionally interchangeable with its predecessor — the 8X300. Page 1 of 6 www.lansdale.com Issue 0 LANSDALE Semiconductor, Inc. SL8X305 Page 2 of 6 www.lansdale.com Issue 0 LANSDALE Semiconductor, Inc. SL8X305 Page 3 of 6 www.lansdale.com Issue 0 LANSDALE Semiconductor, Inc. SL8X305 Page 4 of 6 www.lansdale.com Issue 0 LANSDALE Semiconductor, Inc. SL8X305 Page 5 of 6 www.lansdale.com Issue 0 LANSDALE Semiconductor, Inc. SL8X305 Lansdale Semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Lansdale does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. “Typical” parameters which may be provided in Lansdale data sheets and/or specifications can vary in different applications, and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by the customer’s technical experts. Lansdale Semiconductor is a registered trademark of Lansdale Semiconductor, Inc. Page 6 of 6 www.lansdale.com Issue 0