EM78P267B Datasheet | EMC

DESCRIPTION EM78P267/467A/B/C 8-BIT MICRO-CONTROLLER FOR CONSUMER PRODUCT Preliminary The EM78P267/467A/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 EM78P267/467A/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 EM78P267/467A) (24 I/O pins for EM78P267/467B) (22 I/O pins for EM78P267/467C) - 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 (EM78P267/467A) 28 pin SOIC (EM78P267/467C) - This specification are subject to be changed without notice. 9.5.1997...