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下面是有关EM78P153S单片机的主要功能特征介绍，供客户及技术工程师在芯片解密项目及技术实现过程中进行技术参考和借鉴。
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 user’s code in the OTP memory as well as 15 OPTION bits to match user’s 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 ?A, at 3V/32KHz
* typical of 1?A, 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 user’s 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.
