Title :
A 0.9-V microcontroller for portable applications
Author :
Wild, Andreas ; Quigley, John ; Feddeler, James ; Ledford, Steven ; Caravella, James ; Shapiro, Fred ; Gilsdorf, Ben ; Hong, Merit ; Mietus, Dave ; Davies, Robert B. ; Parmar, Rajiv ; Tai, Jy-Der ; Thomas, Jim ; Quarberg, June ; Hartung, Eytan ; Sawan, To
Author_Institution :
SPS Technol., Motorola Inc., Mesa, AZ, USA
fDate :
7/1/1997 12:00:00 AM
Abstract :
A 0.9-1.6-V, 1-MHz, 8-b microcontroller based on the 68HC08 architecture is presented. In addition to standard digital microcontroller functions, the chip features RAM, ROM, phase-locked loop (PLL) clock synthesis, and liquid crystal displays (LCD) drive capabilities operating from the voltage supply range of a single AA or AAA battery. The design used a library of CMOS microcontroller building blocks, converted into a low-voltage technology using unilateral transistors. The design approach was to optimize the conversion strategy for each functional block and to provide new designs when the conversion was insufficient. The chip exceeded specifications with blocks showing full functionality down to 0.7 V
Keywords :
CMOS digital integrated circuits; microcontrollers; 0.9 to 1.6 V; 1 MHz; 68HC08 architecture; 8 bit; CMOS digital microcontroller; RAM; ROM; design; liquid crystal displays drive; low-voltage technology; one-cell battery; phase-locked loop clock synthesis; portable applications; unilateral transistor; Batteries; CMOS technology; Clocks; Drives; Liquid crystal displays; Microcontrollers; Phase locked loops; Read only memory; Software libraries; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
