W78ERD2 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 RAM................................................................................................................................... 7
6.2 Timers 0, 1 and 2............................................................................................................... 7
6.3 Clock.................................................................................................................................. 8
6.4 Crystal Oscillator................................................................................................................ 8
6.5 External Clock.................................................................................................................... 8
6.6 Power Management........................................................................................................... 8
6.7 Reduce EMI Emission ....................................................................................................... 8
6.8 Reset.................................................................................................................................. 8
7.
SPECIAL FUNCTION REGISTER.............................................................................................. 9
PORT 4 AND BASE ADDRESS REGISTERS.......................................................................... 33
INTERRUPT.............................................................................................................................. 35
ENHANCED FULL DUPLEX SERIAL PORT............................................................................ 36
8.
9.
10.
10.1
10.2
10.3
10.4
10.5
10.6
MODE 0 ....................................................................................................................... 36
MODE 1 ....................................................................................................................... 37
MODE 2 ....................................................................................................................... 38
MODE 3 ....................................................................................................................... 39
Framing Error Detection............................................................................................... 41
Multiprocessor Communications.................................................................................. 41
11.
PROGRAMMABLE COUNTER ARRAY (PCA) ........................................................................ 43
11.1
11.2
11.3
11.4
11.5
PCA Capture Mode...................................................................................................... 46
16-bit Software Timer Comparator Mode .................................................................... 46
High Speed Output Mode ............................................................................................ 47
Pulse Width Modulator Mode....................................................................................... 47
Watchdog Timer........................................................................................................... 48
Publication Release Date: April 20, 2005
- 1 -
Revision A4
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