EM78P247C

DESCRIPTION EM78P247/447A/B/C 8-BIT MICRO-CONTROLLER FOR GENERAL PURPOSE PRODUCT Preliminary The EM78P247/447A/B/C is an 8-bit microprocessor with low-power, high speed CMOS technology. There are 4Kx13 bits Electical One Time Programmable Read Only Memory (OTP-ROM) within it. It provides 1 Protect bit and 6 One-time Programmable Option bits to protect the OTP memory code from any external access as well as the user's options. The OTP ROM will be incorporated into EM78P247/447A/B/C 8-bit microcontroller instead of it's original memory. The user's development program can be easily programmed into or verify from this OTP memory by using EMC OTP PROGRAMMER. FEATURES Operating voltage range: 2.5V~5.5V Available in temperature range: 0°C~70°C Operating frequency range: Crystal Type: DC~20MHz at 5V DC~8MHz at 3V RC Type: DC~4MHz at 5V DC~4MHz at 3V 2Kx13 on chip ROM (EM78267A/B/C) 4Kx13 on chip ROM (EM78467A/B/C) 9 special function registers 148x8 general purpose registers (SRAM) 3 bi-directional tri-state I/O ports (20 I/O pins for EM78P247/447A) (24 I/O pins for EM78P247/447B) (22 I/O pins for EM78247/447C) 5 level stack for subroutine nesting 8-bit real time clock/counter (TCC) with selective signal sources and trigger edges, and with overflow interrupt Selectable oscillator options: XTAL1 type (High frequency) XTAL2 type (32.768KHz) RC type External clock input Two oscillator periods per instruction cycle Power down mode Pro...