W78E52B 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
Timers 0, 1, and 2........................................................................................................... 7
New Defined Peripheral.................................................................................................. 7
Watchdog Timer ............................................................................................................. 9
Clock............................................................................................................................. 11
Power Management...................................................................................................... 11
Reset............................................................................................................................. 11
7.
ON-CHIP FLASH EPROM CHARACTERISTICS..................................................................... 12
7.1
7.2
7.3
7.4
7.5
7.6
7.7
Read Operation ............................................................................................................ 12
Output Disable Condition.............................................................................................. 12
Program Operation ....................................................................................................... 12
Program Verify Operation............................................................................................. 12
Erase Operation............................................................................................................ 12
Erase Verify Operation ................................................................................................. 12
Program/Erase Inhibit Operation.................................................................................. 13
8.
SECURITY BITS....................................................................................................................... 14
8.1
8.2
8.3
Lock Bit ......................................................................................................................... 14
MOVC Inhibit................................................................................................................. 14
Encryption..................................................................................................................... 14
9.
ELECTRICAL CHARACTERISTICS......................................................................................... 15
9.1
9.2
9.3
Absolute Maximum Ratings.......................................................................................... 15
D.C. Characteristics...................................................................................................... 15
A.C. Characteristics...................................................................................................... 17
10.
TIMING WAVEFORMS............................................................................................................. 20
10.1 Program Fetch Cycle.................................................................................................... 20
10.2 Data Read Cycle........................................................................................................... 20
10.3 Data Write Cycle........................................................................................................... 21
Publication Release Date: July 1, 2005
- 1 -
Revision A5
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