EM78267 Overview
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.
Key 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
