General Description
The EM78P173N is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS technology. It has an on-chip 1K×13-bit Electrical One Time Programmable Read Only Memory (OTP-ROM). This device provides a protection bit to prevent intrusion of user’s OTP memory code. Three Code option words are also available to meet user’s requirements. With its enhanced OTP-ROM features, the EM78P173N provides a convenient way of developing and verifying user’s programs. Moreover, this OTP device offers the advantages of easy and effective program updates, using development and programming tools. Users can avail of the ELAN Writer to easily program their development code.



 
Features
CPU configuration
1Kx13 bits on-chip OTP-ROM
48×8 bits on-chip registers (SRAM, General purpose)
5-level stacks for subroutine nesting
4 programmable level voltage detector LVD : 4.5, 4.0, 3.3, 2.2V
3 programmable level voltage reset LVR : 4.0, 3.5, 2.7V
Less than 1.5 mA at 5V/4MHz
Typically 15 μA, at 3V/32kHz
Typically 1 μA, during Sleep mode
I/O port configuration
2 bidirectional I/O ports: P5, P6
12 I/O pins
Wake-up port : P6
7 programmable pull-down I/O pins
7 programmable pull-high I/O pins
7 programmable open-drain I/O pins
External interrupt with wake-up: P60
Operating voltage range:
2.1V~5.5V at 0~70°C (Commercial)
2.3V~5.5V at -40~85°C (Industrial)
Operating frequency range (base on 2 clocks): 
Crystal mode: 
DC~20MHz/2clks @ 5V

DC~8MHz/2clks @ 3V

DC~4MHz/2clks @ 2.1V

ERC mode: 
DC~2 MHz/2clks @ 2.1V

IRC mode: 

Peripheral configuration
8-bit real time clock/counter (TCC) with selective signal sources, trigger edges, and overflow interrupt
External interrupt input pin
2/4 clocks per instruction cycle selected by code option
Power down (Sleep) mode
High EFT immunity 
Four available interrupts
TCC overflow interrupt
Input-port status changed interrupt
External interrupt
Low voltage detect interrupt
Special Features
Programmable free running watchdog timer
Power-on voltage detector available (1.8~1.9V)
Package Type:  
14-pin DIP 300mil : EM78P173ND14J/S
14-pin SOP 150mil : EM78P173NSO14J/S
10-pin MSOP 118mil : EM78P173NMS10J/S
Note: Green products do not contain hazardous .substances.