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Motorola MC6805R Series User Manual
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MC68(7)05R/U
SERIES
8-BIT
MICROCOMPUTERS
JANUARY,
1984
This
document
contains
information
on
a
new
product.
Specifications
and
Information
herein
are
subject
to
change
without
notice.
©MOTOROLA
INC.,
1984
ADI-977
2
Table of Contents
Table of Contents
4
MC6805R2/MC6805U2 Timer Circuitry
29
MC6805R3/MC6805U3 Timer Circuitry
30
Timer Input Mode
31
Timer Input Mode 2
31
Timer Input Mode 4
31
Timer Control Register (TCR)
32
MC68705R3/MC68705U3 and MC68705R5/MC68705U5 Timer Circuitry
33
Software Controlled Mode
36
MOR Controlled Mode
37
Timer Control Register Ncr)
37
RAM Self-Check Subroutine
39
ROM Checksum Subroutine
39
Analog-To-Digital Converter Self-Check
39
Timer Self-Check Subroutine
41
Reset
43
Power-Onreset(Por)
43
External Reset Input
44
Low-Voltage Inhibit (LVI)
44
Internal Clock Generator Options
44
Interrupts
47
Input/Output Circuitry
49
Analog-To-Digital Converter
49
Mask Options
55
On-Chip Programming Hardware
56
Erasing the EPROM
58
Programming Firmware
58
Programming Steps
58
Emulation
60
Bit Manipulation
61
Addressing Modes
62
Immediate
62
Direct
62
Extended
62
Relative
62
Indexed, no Offset
62
Indexed, 8-Bit Offset
62
Indexed, 16-Bit Offset
63
Bit Setlclear
63
Bit Test and Branch
63
Inherent
63
Instruction Set
63
Registerl Memory Instructions
64
Read-Modify-Write Instructions
64
Branch Instructions
64
Bit Manipulation Instructions
64
Control Instructions
64
Alphabetical Listing
64
Opcode Map Summary
64
Electrical Characteristics
73
Power Considerations
74
MC6805R2 and MC6805R3 Characteristics
75
Electrical Characteristics
75
Switching Characteristics
76
AID Converter Characteristics
76
Port Electrical Characteristics
77
Electrical Characteristics
78
Switching Characteristics
78
Port Electrical Characteristics
79
MC68705R3 and MC68705R5 Characteristics
80
Programming Operation Electrical Characteristics
80
Electrical Characteristics
80
Switching Characteristics
81
AID Converter Characteristics
81
Port Electrical Characteristics
82
4
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Motorola MC6805R Series Specifications
General
Brand
Motorola
Model
MC6805R Series
Category
Computer Hardware
Language
English
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