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 Read Operation ..............................................................................................................11
6.7.2 Output Disable Condition................................................................................................11
6.7.3 Program Operation.........................................................................................................11
6.7.4 Program Verify Operation...............................................................................................11
6.7.5 Erase Operation .............................................................................................................11
6.7.6 Erase Verify Operation ...................................................................................................11
6.7.7 Program/Erase Inhibit Operation ....................................................................................12
7.
8.
SECURITY BITS....................................................................................................................... 12
7.1
7.2
7.3
Lock Bit ......................................................................................................................... 13
MOVC Inhibit................................................................................................................. 13
Encryption..................................................................................................................... 13
ELECREICAL CHARACTERISTICS......................................................................................... 14
8.1
8.2
8.3
Absolute Maximum Ratings.......................................................................................... 14
D.C. Characteristics...................................................................................................... 14
A.C. Characteristics...................................................................................................... 15
8.3.1 Clock Input Waveform ....................................................................................................16
8.3.2 Program Fetch Cycle......................................................................................................16
8.3.3 Data Read Cycle ............................................................................................................16
8.3.4 Data Write Cycle.............................................................................................................17
8.3.5 Port Access Cycle ..........................................................................................................17
8.3.6 Program Operation.........................................................................................................17
Publication Release Date: Sep. 6, 2005
- 1 -
Revision A7
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