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