EM78P468L
8-BIT Microcontroller
1 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.
2 FEATURES
2.1 CPU
Operating voltage and temperature range:
EM78P468N:
z
z
Commercial:2.3V ~ 5.5 V. (at 0℃~+70℃)
Industrial: 2.5V ~ 5.5 V. (at -40℃~+85℃)
EM78P468L:
z
z
Commercial:1.9V ~ 5.5 V. (at 0℃~+70℃)
Industrial: 2.1V ~ 5.5 V. (at -40℃~+85℃)
Operation speed: DC ~ 10MHz clock input.
Dual clock operation
z
High frequency oscillator can select among Crystal, RC, or PLL (phase lock
loop)
z
Low frequency oscillator can select between Crystal or RC mode
Totally 272 bytes SRAM
z
144 bytes general purpose register
128 bytes on chip data RAM
z
4K*13 bits OTP - ROM (One Time Programmable - Read Only Memory)
Up to 28 bi-directional tri-state I/O ports
z
Typically, 12 bi-directional tri-state I/O ports.
Product Specification (V1.0) 03.15.2006
• 1
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
