W78ERD2 datasheet(2/76 Pages) ETC2

2 / 76 page

W78ERD2/W78ERD2A

Publication Release Date: March 2, 2009

- 2 -

Revision A12

13.

DUAL DPTR .............................................................................................................................. 50

14.

TIMED-ACCESS PROTECTION .............................................................................................. 51

15.

IN-SYSTEM PROGRAMMING (ISP) MODE............................................................................. 53

16.

H/W REBOOT MODE (BOOT FROM LDROM)........................................................................ 57

17.

OPTION BITS REGISTER ........................................................................................................ 58

18.

ELECTRICAL CHARACTERISTICS ......................................................................................... 60

18.1

Absolute Maximum Ratings .......................................................................................... 60

18.2

D.C. Characteristics ...................................................................................................... 60

18.3

A.C. Characteristics ...................................................................................................... 62

19.

TIMING WAVEFORMS ............................................................................................................. 64

20.

TYPICAL APPLICATION CIRCUITS......................................................................................... 66

20.1

External Program Memory and Crystal ......................................................................... 66

20.2

Expanded External Data Memory and Oscillator .......................................................... 67

21.

PACKAGE DIMENSIONS ......................................................................................................... 68

22.

APPLICATION NOTE................................................................................................................ 70

22.1

In-System Programming (ISP) Software Examples...................................................... 70

22.2

How to Use Programmable Counter Array ................................................................... 74

23.

REVISION HISTORY ................................................................................................................ 75

W78ERD2 Datenblatt(PDF) 2 Page - List of Unclassifed Manufacturers