EM78458/459
8-Bit Microcontroller with MASK ROM
1 GENERAL DESCRIPTION
EM78458 and EM78459 are 8-bit microprocessors designed and developed with
low-power and high-speed CMOS technology. There is a 4K*13-bit Read Only Memory
(ROM) within it.
2 FEATURES
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Operating voltage range: 2.3V~5.5V
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Operating temperature range: 0°C~70°C
Operating frequency range(base on 2 clocks):
ꢁ Crystal mode: DC ~ 20MHz/2clks,5V; DC ~ 8MHz/2clks,3V
ꢁ RC mode: DC ~ 4MHz/2clks,5V; DC ~ 4MHz/2clks,3V
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Low power consumption:
ꢁ Less than 1.5 mA at 5V/4MHz
ꢁ Typically 15 µA, at 3V/32KHz
ꢁ Typically 1 µA, during sleep mode
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4K × 13 bits on chip ROM
84 × 8 bits on chip registers (SRAM)
2 bi-directional I/O ports
8 level stacks for subroutine nesting
8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and
overflow interrupt
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8-bit multichannel Analog-to-Digital Converter with 8-bit resolution
Dual Pulse Width Modulation (PWM ) with 10-bit resolution
One pair of comparators
Power-down (SLEEP) mode
Six available interruptions
ꢁ TCC overflow interrupt
ꢁ Input-port status changed interrupt (wake up from the sleep mode)
ꢁ External interrupt
ꢁ ADC completion interrupt
ꢁ PWM period match completion
ꢁ Comparator high interrupt
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Programmable free running watchdog timer
Product Specification (V1.4) 05.27.2005
• 1
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
