ETL9444 Datasheet - STMicroelectronics

ETL9444 4-BIT NMOS MICROCONTROLLERS

The ETL9444/L9445 and ETL9344/L9345 SingleChip N-Channel Microcontrollers are fully compatible with the COPS® family, fabricated using N-channel, silicon gate XMOS technology. They are complete microcomputers containing all system timing, internal logic, ROM, RAM and I/O necessary to implement dedic.

ETL9444/ETL9445 ETL9344/ETL9345 4-BIT NMOS MICROCONTROLLERS . . . . . . . . . . . . . . . . . . LOW COST POWERFUL INSTRUCTION SET 2k x 8 ROM, 128 x 4 RAM 23 I/O LINES (ETL9444) TRUE VECTORED INTERRUPT, PLUS RESTART THREE-LEVEL SUBROUTINE STACK 16µs INSTRUCTION TIME SINGLE SUPPLY OPERATION (4.5-6.3V) LOW CURRENT DRAIN (13mA max.) INTERNAL TIME-BASE COUNTER FOR REALTIME PROCESSING INTERNAL BINARY COUNTER REGISTER WITH MICROWIRE® SERIAL I/O CAPABILITY GENERAL PURPOSE AND TRI-STATE® OUTPUTS LSTTL/.

ETL9444 Features

* include single supply operation, a variety of output configuration options, with an instruction set, internal architecture and I/O scheme designed to facilitate keyboard input, display output and BCD data manipulation. The ETL9445 is identical to the ETL9444, except with 19 I/O lines instead of 23 :

ETL9444_STMicroelectronics.pdf