EM78862B Ver la hoja de datos (PDF) - ELAN Microelectronics
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EM78862B Datasheet PDF : 40 Pages
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EM78862B
8-Bit RISC Type Microprocessor
1 General Description
The EM78862B is an 8-bit RISC type microprocessor with low power, high speed CMOS
technology. Integrated into the single chip are on chip watchdog (WDT), RAM, ROM,
programmable real-time clock/counter, internal interrupt, power-down mode, LCD driver, and
tri-state I/O. The EM78862B provides a single chip solution for designing DATA-BANK of
message display.
The following table shows how EM78862B compares with other MCU’s of the same series.
Item
EM78862
EM78862B
EM78869
ROM size
16K X 13 bit
16K X 13 bit
8K X 13 bit
RAM size
2.2K X 8 bit
2.2K X 8 bit
0.7K X 8 bit
LCD
60 X 9
60 X 9
40 X 9
LCD RAM Write only when LCD is enabled. Read/Write when disabled.
Oscillator Crystal
Crystal/RC
Crystal/RC
Code option MCLK
MCLK/OSCSEL
MCLK/ELCD/OSCSEL
Pins number 84
84
64
OTP
EM78P862A
EM78P862A
EM78P862A
2 Features
2.1 CPU
Operating voltage range: 2.2V ~ 5.5V
16K X 13 on chip ROM
2.2K X 8 on chip RAM
Up to 29 bi-directional and tri-state I/O ports
8 level stack for subroutine nesting
8-bit real time clock/counter (TCC)
Two sets of 8 bit counters can be interrupt sources
Programmable free running on chip watchdog timer
Four modes (internal PLL clock 3.579MHz)
• SLEEP Mode: CPU and 3.579MHz clock turn off, 32.768KHz clock turn off
• IDLE Mode: CPU and 3.579MHz clock turn off, 32.768KHz clock turn on
• GREEN Mode: 3.579MHz clock turn off, CPU and 32.768KHz clock turn on
• NORMAL Mode: 3.579MHz clock turn on, CPU and 32.768KHz clock turn on
Input port wake up function
Seven interrupt sources; 4 external, 3 internal
84-pin chip (EM78862BH)
Port key scan function
Clock frequency 32.768KHz or RC mode
Eight R-option pins
This specification is subject to change without further notice.
Mar.01.2005 (V1.1) 1 of 36
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