供应义隆单片机裸片EM78P468

General Description

This LSI is an 8-bit RISC type microprocessor with high speed CMOS technology and low power consumption. Integrated onto a single chip are on chip watchdog timer (WDT), Data RAM, ROM, programmable real time clock counter, internal/external interrupt, power down mode, LCD driver, infrared transmitter function, and tri-state I/O. The EM78P468L provides multi-protection bits to protect against intrusion of user’s code in the OTP memory and a seven option bits to accommodate user’s requirements. It also provides an especial 13 bits customer ID option.
With its OTP-ROM feature, this LSI offers a convenient way of developing and verifying user’s programs. Moreover, user developed code can be easily programmed with the ELAN writer.

 


Features
CPU
•	Operating voltage and temperature range: 
* EM78P468N:
   * Commercial:2.3V ~ 5.5 V. (at 0℃~+70℃)
   * Industrial: 2.5V ~ 5.5 V. (at -40℃~+85℃)
* EM78P468L:
   * Commercial:2.1 V ~ 5.5 V. (at ℃~+70℃)
   * Industrial: 2.3V ~ 5.5 V. (at -40℃~+85℃) 
•	Operation speed: DC ~ 10MHz clock input 
•	Dual clock operation 
* High frequency oscillator can select among Crystal, RC, or PLL (phase lock loop) 
* Low frequency oscillator can select between Crystal or RC mode 
•	Totally 272 bytes SRAM 
* 144 bytes general purpose register 
* 128 bytes on chip data RAM 
•	4K x 13 bits OTP - ROM (One Time Programmable - Read Only Memory) 
•	Up to 28 bi-directional tri-state I/O ports 
* Typically, 12 bi-directional tri-state I/O ports 
* 16 bi-directional tri-state I/O ports shared with LCD segment output pin 
•	8-level stack for subroutine nesting 
•	8-bit real time clock/counter (TCC) 
•	One infrared transmitter/PWM generator function 
•	Four sets of 8 bits auto reload down-count timer can be used as interrupt sources 
* Counter 1: independent down-count timer 
* Counter 2, High Pulse Width Timer (HPWT), and Low Pulse Width Timer (LPWT) shared with IR function 
•	Programmable free running on chip watchdog timer (WDT). This function can operate on Normal, Green and Idle mode 
•	Operation modes: 
* Normal mode: The CPU operated on frequency of main oscillator (Fm) 
* Green mode: The CPU operated on frequency sub-oscillator (Fs) and main oscillator (Fm) stop
* Idle mode: CPU idle, LCD display remains working 
* Sleep mode: whole chip stop working 
•	Input port wake up function (PORT6, PORT8). Working on Idle and Sleep mode 
•	Eight interrupt sources, three external and five internal
* Internal interrupt source : TCC; Counter 1,2; High/Low pulse width timer. 
* External interrupt source : INT0, INT1 and Pin change wake-up (Port 6 and Port 8) 
•	Packages: 
* Dice form : 59 pin 
* QFP-64 pin : EM78P468NQ (Body 14mm*20mm) 
* QFP-64 pin : EM78P468LQ (Body 14mm*20mm) 
* LQFP-64 pin : EM78P468NAQ (Body 7mm*7mm) 
* LQFP-64 pin : EM78P468LAQ (Body 7mm*7mm) 
* LQFP-44 pin : EM78P468NBQ (Body 10mm*10mm) 
* LQFP-44 pin : EM78P468LBQ (Body 10mm*10mm) 
* QFP-44 pin : E