W78E51C/W78E051C Data Sheet
8-BIT MICROCONTROLLER
Table of Contents-
1.
2.
3.
4.
5.
GENERAL DESCRIPTION ......................................................................................................... 2
FEATURES................................................................................................................................. 2
PIN CONFIGURATIONS ............................................................................................................ 3
PIN DESCRIPTION..................................................................................................................... 4
FUNCTIONAL DESCRIPTION ................................................................................................... 5
5.1
5.2
5.3
5.4
5.5
5.6
New Defined Peripheral.................................................................................................. 5
Reduce EMI Emission .................................................................................................... 6
Watchdog Timer ............................................................................................................. 7
Clock............................................................................................................................... 8
Power Management........................................................................................................ 9
Reset............................................................................................................................... 9
6.
7.
SECURITY BITS....................................................................................................................... 10
6.1
6.2
6.3
Lock Bit ......................................................................................................................... 10
MOVC Inhibit................................................................................................................. 11
Encryption..................................................................................................................... 11
ELECREICAL CHARACTERISTICS......................................................................................... 12
7.1
7.2
7.3
Absolute Maximum Ratings.......................................................................................... 12
D.C. Characteristics...................................................................................................... 12
A.C. Characteristics...................................................................................................... 14
7.3.1 Clock Input Waveform ....................................................................................................14
7.3.2 Program Fetch Cycle......................................................................................................14
7.3.3 Data Read Cycle ............................................................................................................15
7.3.4 Data Write Cycle.............................................................................................................15
7.3.5 Port Access Cycle ..........................................................................................................15
7.3.6 Program Operation.........................................................................................................16
8.
TIMING WAVEFORMS............................................................................................................. 17
8.1
8.2
8.3
8.4
Program Fetch Cycle.................................................................................................... 17
Data Read Cycle........................................................................................................... 17
Data Write Cycle........................................................................................................... 18
Port Access Cycle......................................................................................................... 18
9.
TYPICAL APPLICATION CIRCUITS ........................................................................................ 19
9.1
9.2
Expanded External Program Memory and Crystal....................................................... 19
Expanded External Data Memory and Oscillator ......................................................... 20
10.
PACKAGE DIMENSIONS......................................................................................................... 21
10.1 40-pin DIP..................................................................................................................... 21
10.2 44-pin PLCC ................................................................................................................. 21
10.3 44-pin PQFP................................................................................................................. 22
REVISION HISTORY................................................................................................................ 23
11.
Publication Release Date: November 10, 2006
- 1 -
Revision A4
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