W79E548/W79L548 Data Sheet
8-BIT MICROCONTROLLER
Table of Contents-
1.
2.
3.
4.
5.
6.
7.
8.
GENERAL DESCRIPTION ......................................................................................................... 3
FEATURES ................................................................................................................................. 3
PIN CONFIGURATIONS ............................................................................................................ 4
PIN DESCRIPTION..................................................................................................................... 5
BLOCK DIAGRAM ...................................................................................................................... 7
FUNCTIONAL DESCRIPTION ................................................................................................... 8
MEMORY ORGANIZATION ....................................................................................................... 9
INSTRUCTION.......................................................................................................................... 28
8.1
9.
10.
11.
Instruction Timing ......................................................................................................... 29
8.1.1
External Data Memory Access Timing............................................................................32
POWER MANAGEMENT.......................................................................................................... 34
INTERRUPTS ........................................................................................................................... 38
PROGRAMMABLE TIMERS/COUNTERS ............................................................................... 40
11.1
11.2
11.3
11.4
Timer/Counters 0 & 1.................................................................................................... 40
Timer/Counter 2............................................................................................................ 43
Pulse Width Modulated Outputs (PWM)....................................................................... 47
Watchdog Timer ........................................................................................................... 50
Framing Error Detection ............................................................................................... 59
Multiprocessor Communications .................................................................................. 59
12.
SERIAL PORT .......................................................................................................................... 54
12.1
12.2
13.
14.
15.
TIMED ACCESS PROTECTION .............................................................................................. 60
H/W REBOOT MODE (BOOT FROM 4K BYTES OF LDFLASH) ............................................ 62
IN-SYSTEM PROGRAMMING ................................................................................................. 63
15.1
15.2
The Loader Program Locates at LDFlash Memory ...................................................... 63
The Loader Program Locates at APFlash Memory ...................................................... 63
16.
17.
18.
H/W WRITER MODE ................................................................................................................ 63
SECURITY BITS ....................................................................................................................... 64
ELECTRICAL CHARACTERISTICS......................................................................................... 65
18.1
18.2
18.3
Absolute Maximum Ratings .......................................................................................... 65
DC Characteristics........................................................................................................ 65
A.C. Characteristics ...................................................................................................... 67
-1-
Publication Release Date: December 12, 2005
Revision A1
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