MC146805H2 MICROPROCESSOR Datasheet

MC146805H2 Datasheet PDF, Equivalent


Part Number

MC146805H2

Description

8-BIT MICROPROCESSOR

Manufacture

Motorola

Total Page 30 Pages
PDF Download
Download MC146805H2 Datasheet PDF


MC146805H2
® MOTOROLA
MC14680SH2
Advance Information
I
8-BIT MICROCOMPUTER UNIT
The MC146805H2 Microcomputer Unit (MCU) belongs to the
M146805 CMOS Family of low-cost, single-chip microcomputers. This
8-bit MCU contains an on-chip oscillator, CPU, RAM, 1/0, and a timer.
The fully static design allows operation at two software selectable fre-
quencies, further reducing its already low power consumption. It is a
low-power processor designed for low-end to mid-range applications in
the consumer, automotive, industrial, and communications market
where very low power consumption constitutes an important factor.
The following are the major features of the MC146805H2 MCU.
HARDWARE FEATURES
• Typical Full Speed Operating Power of 20 mW at 5 V
• Typical WAIT Mode Power of 4 mW
• Typical STOP Mode Power of 5 /LW
• 8-Bit Architecture
• Fully Static Operation
• 112 Bytes of On-Chip RAM
• 2048 Bytes on On-Chip ROM
• 24 Bidirectional 1/0 Lines Plus Four Input-Only Lines
• Internal 8-Bit Timer with Software Programmable 7-Bit Prescaler
• Watchdog Timer
• External Timer Input
• External and Timer Interrupts
• Self-Check Mode
• Master Reset and Power-On Reset
• Single 3- to 6-Volt Supply
• On-Chip Oscillator
• 4O-Pin Dual-in-Line Package
• Chip Carrier Also Available
• Alert Tone Generator
• Frequency Synthesizer
SOFTWARE FEATURES
• Similar to the MC6800
• Efficient Use of Program Space
• Versatile Interrupt Handling
• True Bit Manipulation
• Addressing Modes with Indexed Addressing for Tables
• Efficient Instruction Set
• Memory Mapped 1/0
• Most Self-Check Routines User Callable
This document contains information on a new product. Specifications and information herein
are subject to change without notice
3-962
CMOS
(HIGH-PERFORMANCE SILICON-GATEI
8-BIT
MICROCOMPUTER
::%L~~ijWUUUU"O
CE""LM~~::~AGE
CASE 715
glW:WNo~1'1'i1li'{j
S SUFFIX
CERDIP PACKAGE
' Ip
CASE 734
:~
P SUFFIX
,PLASTIC PACKAGE
CASE 711
Z SUFFIX
CHIP' CARRIER
CASE 761
PIN ASSIGNMENT
PAl
PAO
PBO
PBl
PB2
PB3
PB4
PB5
PB6
PB7
VSS
(3)
(41
(51
(61
(71
(8)
(91
(101
VDD
OSCl
OSC2
TIMER
Synth VSS
XFC
CO
PD7
PD6
PD5
PD4
PD3
PD2
PDl
PD~
ALRT
PC4
PC5
PC6
Pin numbers in parentheses represent equivalent Z
suffix chip carrier pins.

MC146805H2
MC146805H2
TIMER 37
---~
Prescaler
7
Timer!
8 Counter
I Timer Control Register
.---
~
Q)
-(6f>)
Q)
a:
~
u0
i
(/)
FIGURE 1 - BLOCK DIAGRAM
tOSC2
38
OSC1
39 ~
Oscillator
~
I
I
STOP
-. ~
I Synthesizer
I
r1
1
1 Transition
-I Circuit
I
34
CO
~
IT
PAO11~
PA1~
Port PA2~
A PA3~ Port Data
1/0 PA4~ A
Dir I---<
Ines PA5~ Reg Reg
PA6~
PA7~
PBO~
PB1~
art
B
10
Ines
PB2~
PB3~
PB4~
PB5~
Port
B
Reg
Data
Dlr H
Reg
PB6~
PB7~
Accumulator
8A
Index
Register
8X
Condition
Code
5 Register CC
Stack
6 POinter S
Program
Counter
5 High PCH
Program
Counter
8 low PCl
NaTE:
See Pin Assignment diagram for equiva-
lent chip carrier pin numbers_
T
2048x8
ROM
256x8
ROM
CPU
1
r-
Y
CPU
Control
AlU
112 x 8
RAM
-'-..I
1
RESET
3 NUM
2 IRQ
Alert
Tone
Generator
p.. AlRT
~ Watchdog
Timer
. .P-o-rt24~
~~r - - - C ~
PC4 Port
PC5 C
PC6 Input
PC7 lines
Data
~ Dir
Reg
~P DO
Port
0
Reg
~P
~P
~;
~~PPDD~
Port
D
1/0
~PD5 lines
~PD6
~PD 7
I
3-963


Features ® MOTOROLA MC14680SH2 Advance Informa tion I 8-BIT MICROCOMPUTER UNIT The M C146805H2 Microcomputer Unit (MCU) belo ngs to the M146805 CMOS Family of low-c ost, single-chip microcomputers. This 8 -bit MCU contains an on-chip oscillator , CPU, RAM, 1/0, and a timer. The fully static design allows operation at two software selectable frequencies, furthe r reducing its already low power consum ption. It is a low-power processor desi gned for low-end to mid-range applicati ons in the consumer, automotive, indust rial, and communications market where v ery low power consumption constitutes a n important factor. The following are t he major features of the MC146805H2 MCU . HARDWARE FEATURES • Typical Full Sp eed Operating Power of 20 mW at 5 V • Typical WAIT Mode Power of 4 mW • Ty pical STOP Mode Power of 5 /LW • 8-Bi t Architecture • Fully Static Operati on • 112 Bytes of On-Chip RAM • 204 8 Bytes on On-Chip ROM • 24 Bidirecti onal 1/0 Lines Plus Four Input-Only Lines • Internal 8-Bit Timer with Software P.
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