EM78862C Ver la hoja de datos (PDF) - ELAN Microelectronics

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EM78862C

8-Bit Microcontroller

ELAN Microelectronics 

EM78862C

8-Bit RISC Type Microprocessor

2.2 LCD

LCD operation voltage: 4.5 V ( VDD must be fixed at 3V )

Common driver pins: 16

Segment driver pins: 32

1/4 bias

1/16 duty

3 Applications

Data Bank

Message display box

Scientific calculator

3.1 Application Notes

In switching the main clock (from high frequency to low frequency or vice versa), or

waking up from idle mode, 6 ~ 8 delay instructions (NOP) must be added.

Avoid directly switching to Idle mode or Sleep mode from Normal mode. You must

initially switch to Green mode, and then to Idle mode or Sleep mode.

Under DATA RAM least address (A0~A7), when “INC” instruction is in use and

overflow occurs, the middle address will automatically be incremented. If “DEC”

instruction and least address from 0x00→0xFF is used, the middle address cannot

and will not be automatically decremented.

The Look-up table instruction can only change the program counter’s Bit 7 ~ Bit 0 at

a time and only 256 address can be searched on one occasion. If each 256

address is called as “zone” and each program page contains 1024 address, then

each page contains four zones. When two zones overlap within a table, a bug will

occur during address search. So you must examine the *.LST file after each

compilation. The *.LST file will jot down the information, instruction address, etc.,

as well as the error messages if bug is found.

During a reset, the values of the registers in the target chip (EM78862C) and that of

ICE-808 may differ from each other. As the 808 ROMless chip of ICE is used to

develop a program for EM78862C, its reset (initial) values cannot be repeated as

reset values for the target chip. Otherwise, error may occur. The register reset

values for the target chip should be those described in the EM78862C specification,

not those from ICE-808.

Applicable MASK, OTP, and ICE

MASK

EM78862C

OTP

EM78P808

ICE

ICE 808

2•

Product Specification (V2.1) 07.13.2005

(This specification is subject to change without further notice)

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