HTG1390 Datasheet, PDF (1/27 Pages) Holtek Semiconductor Inc – 4-bit Microcontroller

Preliminary
HTG1390
4-bit Microcontroller
Features
• _{Operating voltage: 1.2V~1.8V}
• _{7 input lines}
• _{3 output lines}
• _{Halt feature reduces power consumption}
• _{Up to 16µs instruction cycle with 256kHz}
system clock at VDD=1.5V
• _{All instructions in 1 or 2 machine cycles}
• _{4K×8 program ROM}
• _{Data memory RAM size 128×4 bits}
General Description
The HTG1390 is the processor from Holtek’s
4-bit stand alone single chip microcontroller
range specifically designed for LCD product ap-
plications. The device is ideally suited for mul-
• _{27×3 segment LCD driver}
• _{8-bit table read instruction}
• _{5 working registers}
• _{Internal timer overflow interrupt}
• _{One level subroutine nesting}
• _{RC oscillator for system clock}
• _{8-bit timer with internal clock source}
• _{Sound effect circuit}
tiple LCD low power applications among which
are calculators, scales, and hand held LCD
products.
1
17th Nov ’98