EM78P447S

EM78P447S I. GENERAL DESCRIPTION EM78P447S is an 8-bit microprocessor with low-power and high-speed CMOS technology. There is a 4096*13bit Electrical One Time Programmable Read Only Memory (OTP-ROM) within it. It provides a PROTECTION bit to prevent a user’s code from intruding as well as 8 other OPTION bits to match the user’s requirements. Because of the OTP-ROM, the EM78P447S offers users a convenient way to develop and verify their programs. Moreover, a user’s developed code can be programmed easily by an EMC writer. II. FEATURES Operating voltage range: 2.2V~5.5V Available in temperature range: 0°C~70°C Operating frequency range: DC ~ 20MHz Low power consumption: * less than 2.2 mA at 5V/4MHz * typical of 30µA at 3V/32KHz * typical of 1µA during the sleep mode 4096 x 13 bits on chip ROM 148 x 8 bits on chip registers (SRAM) 3 bi-directional I/O ports 5 level stacks for subroutine and interrupt 8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt Power-down mode (SLEEP mode) Two available interruptions * TCC overflow interrupt * External interrupt(INT pin) Programmable free running watchdog timer 10 programmable pull-high I/O pins 2 programmable R-option I/O pins 2 programmable open-drain I/O pins Two clocks per instruction cycle 99.9% single instruction cycle commands Package type: * 28 pin DIP and SOIC (EM78P447SA) * 32 pin DIP and SOIC (EM78P447SB) * This specification is sub...