General Description

EM78P153S is an 8-bit microprocessor with low-power and high-speed CMOS technology. It is equipped with a 1024 x 13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM) within it. It provides a PROTECTION bit to prevent intrusion of userˇs code in the OTP memory as well as 15 OPTION bits to match userˇs requirements. With its OTP-ROM feature, the EM78P153S offers users a convenient way of developing and verifying their programs. Moreover, user developed code can be easily programmed with the ELAN writer.



 


Features


?14-lead packages : EM78P153S
?Operating voltage range : 2.3V~5.5V
?Available in temperature range: 0C~70C
?Operating frequency range (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.
?Low power consumption:
* less then 1.5 mA at 5V/4MHz
* typical of 15 μA, at 3V/32KHz
* typical of 1μA, during the sleep mode
?1024 x 13 bits on chip ROM
?Built-in calibrated IRC oscillators (8MHz, 4MHz, 1MHz, 455KHz )
?Programmable prescaler of oscillator set-up time
?One security register to prevent the code in the OTP memory from intruding
?One configuration register to match the userˇs requirements
?32⊙ 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 and trigger edges,
?and with overflow interrupt
?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
?7 programmable pull-high I/O pins
?7 programmable open-drain I/O pins
?6 programmable pull-down I/O pins
?Two clocks per instruction cycle
?Package type: 14 pins SOP, DIP
* 14 pin DIP 300mil: EM78P153SP
* 14 pin SOP 150mil: EM78P153SN
?The transient point of system frequency between HXT and LXT is around 400KHz.

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