W78E54C 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
Timers 0, 1, and 2........................................................................................................... 7
New Defined Peripheral.................................................................................................. 7
6.2.1 INT2 / INT3 ...................................................................................................................7
6.2.2 PORT4 .............................................................................................................................8
6.2.3 Reduce EMI Emission ......................................................................................................8
6.3
6.4
6.5
6.6
6.7
Power-off Flag ................................................................................................................ 9
Watchdog Timer ............................................................................................................. 9
Clock............................................................................................................................. 11
Power Management...................................................................................................... 11
Reset............................................................................................................................. 11
7.
8.
SECURITY BITS....................................................................................................................... 11
7.1
7.2
7.3
Lock Bit ......................................................................................................................... 12
MOVC Inhibit................................................................................................................. 12
Encryption..................................................................................................................... 12
ELECTRICAL CHARACTERISTICS......................................................................................... 13
8.1
8.2
8.3
Absolute Maximum Ratings.......................................................................................... 13
D.C. Characteristics...................................................................................................... 13
A.C. Characteristics...................................................................................................... 15
8.3.1 Clock Input Waveform ....................................................................................................15
8.3.2 Program Fetch Cycle......................................................................................................15
8.3.3 Data Read Cycle ............................................................................................................16
8.3.4 Data Write Cycle.............................................................................................................16
8.3.5 Port Access Cycle ..........................................................................................................16
8.3.6 Program Operation.........................................................................................................16
Publication Release Date: May 17, 2005
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Revision A3