General Description
The EM78F734N is an 8-bit microprocessor designed and developed with low-power, high-speed CMOS technology and
high noise immunity. It has an on-chip 4K×13-bit Electrical Flash Memory and 128×8-bit In-system programmable
EEPROM. It provides three protection bits to prevent intrusion of user’s Flash memory code.
With its enhanced Flash-ROM feature, the EM78F734N provides a convenient way of developing and verifying user’s
programs. Moreover, this Flash-ROM device offers the advantages of easy and effective program updates, using
development and programming tools. Users can avail of the ELAN Writer to easily program their development codes.

Features
􀂄 CPU Configuration
• 4K×13 bits Flash memory
• 144×8 bits on-chip registers (SRAM)
• 128 bytes In-system programmable EEPROM
• 8-level stacks for subroutine nesting
􀂄 I/O Port Configuration
• Three bidirectional I/O ports
• Wake-up port : P6
• 12 Programmable pull-down I/O pins
• 8 programmable pull-high I/O pins
• 4 programmable open-drain I/O pins
• External interrupt : P60
􀂄 Operating Voltage Range:
• 2.2V~5.5V @ – 40°C ~85°C (Industrial)
• 2.2V~5.5V @ 0°C ~70°C (Commercial)
􀂄 Operating frequency range (base on two clocks):
• IRC Drift Rate (Vdd @ 3.3V)

Eight available interrupts:
• Internal interrupt: 4
• External interrupt: 4
􀂄 Seven channels Analog-to-Digital Converter with
12-bit resolution
􀂄 Peripheral Configuration
• 8-bit real Timer Clock/Counter (TCC) with
selective signal sources, trigger edges, and
overflow interrupt
• Power down (Sleep) mode
• Four programmable Level Voltage Reset (LVR)
(LVR) : 3.3V, 3.0V, 2.6V, and 2.0V (POR)
• Three security registers to prevent intrusion of
Flash memory codes
• One configuration register to accommodate
user’s requirements
• Two clocks per instruction cycle
• High EFT immunity
• Two sub-frequencies; 128kHz and 16kHz,
the 16kHz is provided by dividing the 128kHz

16-pin DIP 300mil : EM78F734ND16
• 16-pin SOP 300mil : EM78F734NSO16
• 16-pin SSOP 150mil : EM78F734NSS16
• 18-pin DIP 300mil : EM78F734ND18
• 18-pin SOP 300mil : EM78F734NSO18
• 20-pin DIP 300 mil : EM78F734ND20
• 20-pin SOP 300mil : EM78F734NSO20
Note: These are Green Products which do not contain
hazardous substances.

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