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EM78P156E Datasheet, PDF (1/28 Pages) ELAN Microelectronics Corp – 8-bit microprocessor with low-power and high-speed CMOS technology | |||
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EM78P156E
I. GENERAL DESCRIPTION
EM78P156E is an 8-bit microprocessor with low-power and high-speed CMOS technology. There is a 1K*13-
bit Electrical One Time Programmable Read Only Memory (OTP-ROM) within it. It provides a PROTECTION
bit to prevent a userâs code from intruding as well as 7 OPTION bits to match the userâs requirements.
Because of the OTP-ROM, the EM78P156E offers users a convenient way to develop and verify their programs.
Moreover, a userâs developed code can be programmed easily by an EMC writer.
II. FEATURES
⢠Operating voltage range: 2.2V~5.5V
⢠Available in temperature range: 0°C~70°C
⢠Operating frequency range: DC ~ 36MHz
⢠Low power consumption:
* less than 1.6 mA at 5V/4MHz
* typical of 15 µA at 3V/32KHz
* typical of 1 µA during the sleep mode
⢠1Kx13 bits on chip ROM
⢠One security register to prevent the code in the OTP memory from intruding
⢠One configuration register to match the userâs requirements
⢠48x8 bits on chip registers (SRAM)
⢠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
⢠Two clocks per instruction cycle
⢠Power-down mode (SLEEP mode)
⢠Three available interruptions
* TCC overflow interrupt
* Input-port status changed interrupt (wake up from the sleep mode)
* External interrupt
⢠Programmable free running watchdog timer
⢠8 pull-high pins
⢠7 pull-down pins
⢠8 open-drain pins
⢠Two R-option pins
⢠Package type: SOP, SOIC and DIP
⢠99.9% single instruction cycle commands
* This specification is subject to be changed without notice. 8.11.1999
B3-1
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