EM78267A

DESCRIPTION EM78267/467A/B/C 8-BIT MICRO-CONTROLLER FOR TELECOM PRODUCT Preliminary The EM78267/467 A/B/C is an 8-bit microprocessor with low-power, high speed CMOS technology. Integrated onto a single chip are on-chip watchdog timer (WDT), RAM, ROM, programmable real time clock/counter, power down mode and bi-directional tri-state I/O ports. It can be developed as cordless phone or other applications. 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 EM78267/467A) (24 I/O pins for EM78267/467B) (22 I/O pins for EM78267/467C) 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 Programmable wake up from sleep circuit on I/O ports Programmable free running on-chip watchdog timer Ten pull-up and wake-up pins Two open-drain pins Two R-option pins Interrupt function available 28 pin DIP, SOIC, SSOP (EM78267/467A) 28 pi...