W78E51B 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
6.7
New Defined Peripheral.................................................................................................. 7
Reduce EMI Emission .................................................................................................... 8
Watchdog Timer ............................................................................................................. 9
Clock ............................................................................................................................. 10
Power Management...................................................................................................... 10
Reset............................................................................................................................. 11
On-Chip ROM Characteristics ...................................................................................... 11
6.7.1
6.7.2
6.7.3
6.7.4
6.7.5
6.7.6
6.7.7
Read Operation ..............................................................................................................11
Output Disable Condition................................................................................................11
Program Operation .........................................................................................................11
Program Verify Operation ...............................................................................................11
Erase Operation .............................................................................................................11
Erase Verify Operation ...................................................................................................11
Program/Erase Inhibit Operation ....................................................................................12
7.
SECURITY BITS ....................................................................................................................... 12
7.1
7.2
7.3
Lock Bit ......................................................................................................................... 13
MOVC Inhibit................................................................................................................. 13
Encryption ..................................................................................................................... 13
Absolute Maximum Ratings .......................................................................................... 14
D.C. Characteristics...................................................................................................... 14
A.C. Characteristics ...................................................................................................... 15
8.3.1
8.3.2
8.3.3
8.3.4
8.3.5
8.3.6
Clock Input Waveform ....................................................................................................16
Program Fetch Cycle......................................................................................................16
Data Read Cycle ............................................................................................................16
Data Write Cycle.............................................................................................................17
Port Access Cycle ..........................................................................................................17
Program Operation .........................................................................................................17
8.
ELECREICAL CHARACTERISTICS......................................................................................... 14
8.1
8.2
8.3
-1-
Publication Release Date: Sep. 6, 2005
Revision A7
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