
W78E52C/W78E052C Data Sheet
8-BIT MICROCONTROLLER
Publication Release Date: November 6, 2006
- 1 -
Revision A4
Table of Contents-
1.
2.
3.
4.
5.
GENERAL DESCRIPTION ......................................................................................................... 2
FEATURES................................................................................................................................. 2
PIN CONFIGURATIONS ............................................................................................................ 3
PIN DESCRIPTION..................................................................................................................... 4
FUNCTIONAL DESCRIPTION ................................................................................................... 5
5.1
Timers 0, 1, and 2........................................................................................................... 5
5.2
New Defined Peripheral.................................................................................................. 5
5.3
Watchdog Timer ............................................................................................................. 7
5.4
Clock............................................................................................................................... 9
5.5
Power Management........................................................................................................ 9
5.6
Reset............................................................................................................................... 9
SECURITY BITS....................................................................................................................... 10
6.1
Lock Bit......................................................................................................................... 10
6.2
MOVC Inhibit................................................................................................................. 10
6.3
Encryption.....................................................................................................................10
ELECTRICAL CHARACTERISTICS......................................................................................... 11
7.1
Absolute Maximum Ratings.......................................................................................... 11
7.2
D.C. Characteristics...................................................................................................... 11
7.3
A.C. Characteristics...................................................................................................... 13
TIMING WAVEFORMS............................................................................................................. 16
8.1
Program Fetch Cycle.................................................................................................... 16
8.2
Data Read Cycle........................................................................................................... 16
8.3
Data Write Cycle........................................................................................................... 17
8.4
Port Access Cycle......................................................................................................... 17
TYPICAL APPLICATION CIRCUITS........................................................................................ 18
9.1
Expanded External Program Memory and Crystal....................................................... 18
9.2
Expanded External Data Memory and Oscillator ......................................................... 19
PACKAGE DIMENSIONS......................................................................................................... 20
10.1
40-pin DIP..................................................................................................................... 20
10.2
44-pin PLCC ................................................................................................................. 20
10.3
44-pin PQFP................................................................................................................. 21
REVISION HISTORY................................................................................................................ 22
6.
7.
8.
9.
10.
11.