The EM78P469 is an 8-bit RISC type microprocessor with low power, high speed
CMOS technology. Integrated onto a single chip are on-chip watchdog (WDT), Data
RAM, ROM, programmable real time clock counter, internal/external interrupt, power
down mode, LCD driver IROUT function and tri-state I/O.

• Operating voltage: 2.3V～5.5V
• Operating temperature: -20°C~85°C
• Dual clock operation or PLL operation mode
• Crystal/RC oscillation circuit selected by code option for system clock
• 32.768kHz crystal/RC oscillation circuit selected by code option for sub-oscillation
• 144 byte general purpose register
• 512×8 bits on chip data RAM
• 84K×13 on chip Electrical One Time Programmable Read Only Memory (OTP-ROM)
• Up to 33 bidirectional tri-state I/O ports
• 8-level stack for subroutine nesting
• 8-bit real time clock/counter (TCC)
• One IROUT/PWM generator
• Four sets of 8 bit auto reload counter/timer can be interrupt sources
• 16 bit counter: Combined CNT1 with CNT2
• Programmable free running on-chip watchdog timer
• Operation mode

• Normal mode
• Green mode
• Idle mode
• Sleep mode

• Input port wake-up function (Port 6, Port 8)
• 8 interrupt sources, 2 external, 6 interna

• LCD

• Common driver pins: 4
• Segment driver pins: 40
• 1/3, 1/2 bias
• 1/4, 1/3, 1/2 duty