EM78P808 Ver la hoja de datos (PDF) - ELAN Microelectronics

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EM78P808

8-BIT MICRO-CONTROLLER

ELAN Microelectronics 

EM78808

8-bit Micro-controller

User Application Note

1. ROM, OTP, ICE

ROM

EM78808

OTP

EM78P808

ICE

EM78808 ICE

2. The difference between EM78R808A , EM78P808 and EM78808 are listed in the table

EM78R808A EM78P808

EM78808

Comparator reference voltage VDD

VDD or 2V

VDD or 2V

Stack pointer

X

O

X

Data ROM max access frequency 10.74 MHz 10.74MHz

3.58 MHz

3.For accessing data ROM,EM78P808 (OTP) can work at 10.74MHz, but please note that

ROM type EM78808 only can work at 3.58MHz

4. While switching main clock (regardless of high freq to low freq or on the other hand),

adding 6 instructions delay (NOP) is required.

6. For DATA ROM or DATA RAM least address(A0~A7), when using “INC”

instruction and overflow occur, the middle address will auto_increase. If using “DEC”

instruction and least address from 0x00 0xFF, the middle address can’t

auto_decrease.

7. Please do not switch MCU operation mode from normal mode to idle or sleep mode

directly. Before into idle or sleep mode, please switch MCU to green mode.

8. Please always keep RA page0 bit7 = 0 or un-expect error will happen!!

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* This specification is subject to change without notice.

8/1/2004 (V3.1)

3

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