EM78451AP EMC [ELAN Microelectronics Corp], EM78451AP Datasheet - Page 5

• Manufacturer Part Number: EM78451AP
• Description: 8-Bit Microcontroller
• Manufacturer: EMC [ELAN Microelectronics Corp]

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Product Specification (V1.2) 05.27.2004
(This specification is subject to change without further notice)
GENERAL DESCRIPTION
FEATURES
The EM78451 is an 8-bit microprocessor designed and developed with low-power and
high speed CMOS technology. Its operation kernel is implemented with RISC-like
architecture, and it is available in the mask ROM version. This device is also equipped
with the Serial Peripheral Interface (SPI) function and an easy-implemented RS-232.
The EM78451 is extremely suitable for wired communication. In fact, there are only
fifty-eight (58) easy-to-learn instructions required plus the user’s program can be
emulated with the EMC In-Circuit Emulator (ICE).
Operating voltage ranges between: 2.3V~5.5V.
Operating temperature ranges between: 0°C~70°C.
Operating frequency ranges between (based on 2 clocks):
Low power consumption:
(SPI) Serial Peripheral Interface is also available.
4K × 13 bits on chip ROM (EM78451).
11 Special function registers.
140× 8 bits On- chip general-purpose registers.
5 Bi-directional I/O ports (35 I/O pins).
3 LED Direct sinking pins with internal serial resistors.
Built-in RC oscillator with external serial resistor, ±10% variation.
Built-in power-on reset.
Five stacks designed for subroutine nesting.
8-bit Real time clock/counter (TCC) with overflow interrupt.
Two to four machine -clocks for each instruction cycle.
Power down mode.
I/O ports have a Programmable wake-up function from sleep circuit.
Programmable free running on-chip watchdog timer.
12 Wake-up pins.
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1Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V, DC~4MHz at 2.3V.
RC mode: DC~4MHz at 5V, DC~4MHz at 3V, DC~4MHz at 2.3V.
Less then 3 mA at 5V/4MHz
Typically 10 µA during sleep mode
8-Bit Microcontroller
EM78451
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