W78E51C Data Sheet
8-BIT MICROCONTROLLER
Table of Contents-
1.
2.
3.
4.
5.
6.
GENERAL DESCRIPTION ......................................................................................................... 3
FEATURES................................................................................................................................. 3
PIN CONFIGURATIONS............................................................................................................. 4
PIN DESCRIPTION..................................................................................................................... 5
BLOCK DIAGRAM ...................................................................................................................... 6
FUNCTIONAL DESCRIPTION.................................................................................................... 7
6.1
6.2
6.3
6.4
6.5
6.6
New Defined Peripheral.................................................................................................. 7
Reduce EMI Emission .................................................................................................... 8
Watchdog Timer ............................................................................................................. 9
Clock............................................................................................................................. 10
Power Management...................................................................................................... 10
Reset............................................................................................................................. 11
7.
8.
SECURITY BITS....................................................................................................................... 11
7.1
7.2
7.3
Lock Bit ......................................................................................................................... 11
MOVC Inhibit................................................................................................................. 12
Encryption..................................................................................................................... 12
ELECREICAL CHARACTERISTICS......................................................................................... 12
8.1
8.2
8.3
Absolute Maximum Ratings.......................................................................................... 12
D.C. Characteristics...................................................................................................... 12
A.C. Characteristics...................................................................................................... 14
8.3.1 Clock Input Waveform ....................................................................................................14
8.3.2 Program Fetch Cycle......................................................................................................14
8.3.3 Data Read Cycle ............................................................................................................15
8.3.4 Data Write Cycle.............................................................................................................15
8.3.5 Port Access Cycle ..........................................................................................................15
8.3.6 Program Operation.........................................................................................................16
9.
TIMING WAVEFORMS............................................................................................................. 17
9.1
9.2
9.3
9.4
Program Fetch Cycle.................................................................................................... 17
Data Read Cycle........................................................................................................... 17
Data Write Cycle........................................................................................................... 18
Port Access Cycle......................................................................................................... 18
Publication Release Date: April 20, 2005
- 1 -
Revision A2
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