W78E51C/W78E051C Data Sheet
8-BIT MICROCONTROLLER
Publication Release Date: November 10, 2006
- 1 - Revision A4
Table of Contents-
1. GENERAL DESCRIPTION......................................................................................................... 2
2. FEATURES................................................................................................................................. 2
3. PIN CONFIGURATIONS ............................................................................................................ 3
4. PIN DESCRIPTION..................................................................................................................... 4
5. FUNCTIONAL DESCRIPTION ................................................................................................... 5
5.1 New Defined Peripheral.................................................................................................. 5
5.2 Reduce EMI Emission .................................................................................................... 6
5.3 Watchdog Timer ............................................................................................................. 7
5.4 Clock...............................................................................................................................8
5.5 Power Management........................................................................................................ 9
5.6 Reset............................................................................................................................... 9
6. SECURITY BITS....................................................................................................................... 10
6.1 Lock Bit......................................................................................................................... 10
6.2 MOVC Inhibit................................................................................................................. 11
6.3 Encryption..................................................................................................................... 11
7. ELECREICAL CHARACTERISTICS......................................................................................... 12
7.1 Absolute Maximum Ratings.......................................................................................... 12
7.2 D.C. Characteristics...................................................................................................... 12
7.3 A.C. Characteristics...................................................................................................... 14
7.3.1 Clock Input Waveform....................................................................................................14
7.3.2 Program Fetch Cycle......................................................................................................14
7.3.3 Data Read Cycle ............................................................................................................15
7.3.4 Data Write Cycle.............................................................................................................15
7.3.5 Port Access Cycle ..........................................................................................................15
7.3.6 Program Operation.........................................................................................................16
8. TIMING WAVEFORMS............................................................................................................. 17
8.1 Program Fetch Cycle.................................................................................................... 17
8.2 Data Read Cycle........................................................................................................... 17
8.3 Data Write Cycle........................................................................................................... 18
8.4 Port Access Cycle......................................................................................................... 18
9. TYPICAL APPLICATION CIRCUITS........................................................................................ 19
9.1 Expanded External Program Memory and Crystal....................................................... 19
9.2 Expanded External Data Memory and Oscillator ......................................................... 20
10. PACKAGE DIMENSIONS......................................................................................................... 21
10.1 40-pin DIP..................................................................................................................... 21
10.2 44-pin PLCC ................................................................................................................. 21
10.3 44-pin PQFP................................................................................................................. 22
11. REVISION HISTORY................................................................................................................ 23