EM78468B中文资料OTP LCD+ADC Type MCU Series数据手册Elan规格书

描述 Description

The EM78468B is an 8-bit microprocessor designed and developed with low-power and high-speed CMOS technology.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 series has an on-chip 4K*13-bit Electrical Mask Read Only Memory(Mask-ROM).The EM78468B provides multi-protection bits to prevent intrusion of user's Mask memory code.Seven Code option bits are available to meet user's requirements.Special 13 bits customer ID options are provided as well.

With its enhanced Mask-ROM feature, the EM78468B provides a convenient way of developing and verifying user's programs.Moreover, this Mask device offers the advantages of easy and effective program updates, using development and programming tools.User can avail of the ELAN Writer to easily program his development code.

特性 Features

CPU Configuration
4K*13 bits on-chip OTP-ROM
144 bytes general purpose register
128 bytes on-chip data RAM
272 bytes SRAM
8-level stacks for subroutine nesting
Power-on voltage detector provided (1.7±0.1V) for EM78P468B
I/O Port Configuration
Typically, 12 bidirectional tri-state I/O ports.
16 bidirectional tri-state I/O ports shared with LCD segment output pin.
Up to 28 bidirectional tri-state I/O ports
Operating Voltage and Temperature Range
Commercial: 2.1V ~ 5.5 V (at 0°C ~ 70°C)
Industrial: 2.3V ~ 5.5 V (at -40°C ~ 85°C)
Operating Mode
Normal mode : The CPU is operated on main oscillator frequency (Fm)
Green mode : The CPU is operated on sub-oscillator frequency(Fs) and main oscillator(Fm) is stopped.
Idle mode: CPU idle, LCD display remains working
Sleep mode: The whole chip stops working
Input port wake-up function (Port 6, Port 8):Works on Idle and Sleep mode.
Operation speed: DC ~ 10 MHz clock input.
Dual clock operation
Oscillation Mode
High frequency oscillator can select among Crystal, RC, or PLL(phase lock loop)
Low frequency oscillator can select between Crystal or RC modeIRC mode:
Peripheral Configuration
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 in Normal, Green and Idle mode.
Eight Interrupt Sources: Three External and Five Internal
Internal interrupt source: TCC; Counters 1, 2; High/Low pulse width timer.
External interrupt source : INT0, INT1 and Pin change wake-up (Port 6 and Port 8)
LCD Circuit
Common driver pins: four
Segment driver pins: 32
LCD Bias: 1/3, 1/2 bias
LCD Duty: 1/4, 1/3, 1/2 duty
Package Type
Dice form: 59 pins
QFP-64 pin: EM78468BQxS/xJ (Body 14mm*20mm)
LQFP-64 pin: EM78468BAQxS/xJ (Body 7mm*7mm)
Note: These are Green products which do not contain hazardous substances.