EM78156E
8-Bit Microcontroller with MASK ROM
1 GENERAL DESCRIPTION
EM78156E is an 8-bit microprocessor with low-power and high-speed CMOS
technology. Integrated into a single chip are on-chip watchdog timer (WDT), RAM,
ROM, real time clock/counter, external and interrupt, power down mode, and tri-state
I/O.
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 rang (base on 2 clocks ):
• Crystal mode: DC~20MHz at 5V, DC~8MHz at 3V, DC~4MHz at 2.3V.
• ERC mode: DC~4MHz at 5V, DC~4MHz at 3V, DC~4MHz at 2.3V.
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Low power consumption:
• Less then 2.0 mA at 5V/4MHz
• Typically 15 µA at 3V/32KHz
• Typically 1 µA during sleep mode
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1K × 13 bits on chip ROM
One configuration register to accommodate user’s requirements
48× 8 bits on chip registers (SRAM, general purpose register)
2 bi-directional I/O ports
5 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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Two clocks per instruction cycle
Power down (SLEEP) mode
Three available interruptions
• TCC overflow interrupt
• Input-port status changed interrupt (wake up from sleep mode)
• External interrupt
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Programmable free running watchdog timer
8 programmable pull-high pins
7 programmable pull-down pins
8 programmable open-drain pins
Product Specification (V1.3) 07.29.2004
• 1
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
