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Atmel ATtiny13A User Manual
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157
8126F–AVR–05/12
ATtiny13A
Figure 19-65.
128 kHz W
atchdog Osc
illator Frequency vs. V
CC
Figure 19-66.
128 kHz W
atchdog Oscillator
Frequency vs. Temperature
WATCHDOG OSCILLATOR FREQUENCY vs. OPERATING VOLTAGE
85 °C
25 °C
-40 °C
100000
102000
104000
106000
108000
110000
112000
114000
116000
1.5
2
2.5
3
3.5
4
4.5
5
5.5
V
CC
(V)
Frequency (Hz)
WATCHDOG OSCILLATOR FREQUENCY vs. TEMPERATURE
5.5 V
4.0 V
2.7 V
1.8 V
105000
106000
107000
108000
109000
110000
111000
112000
113000
114000
115000
-60
-40
-20
0
20
40
60
80
100
Temperature
Frequency (kH)
156
158
Table of Contents
Default Chapter
1
Features
1
1 Pin Configurations
2
Pin Description
3
2 Overview
4
Block Diagram
4
3 About
6
Resources
6
Code Examples
6
Data Retention
6
4 CPU Core
7
Architectural Overview
7
ALU - Arithmetic Logic Unit
8
Status Register
8
General Purpose Register File
10
Stack Pointer
11
Instruction Execution Timing
12
Reset and Interrupt Handling
12
5 Memories
15
In-System Reprogrammable Flash Program Memory
15
SRAM Data Memory
15
EEPROM Data Memory
16
I/O Memory
20
Register Description
20
6 System Clock and Clock Options
23
Clock Systems and Their Distribution
23
Clock Sources
24
System Clock Prescaler
26
Register Description
27
7 Power Management and Sleep Modes
30
Sleep Modes
30
Software BOD Disable
31
Power Reduction Register
31
Minimizing Power Consumption
32
Register Description
33
8 System Control and Reset
35
Resetting the AVR
35
Reset Sources
36
Internal Voltage Reference
38
Watchdog Timer
38
Register Description
42
9 Interrupts
45
Interrupt Vectors
45
External Interrupts
46
Register Description
47
10 O Ports
49
Overview
49
Ports as General Digital I/O
50
Alternate Port Functions
54
Register Description
57
11 8-Bit Timer/Counter0 with PWM
59
Features
59
Overview
59
Timer/Counter Clock Sources
60
Counter Unit
60
Output Compare Unit
61
Compare Match Output Unit
63
Modes of Operation
64
Timer/Counter Timing Diagrams
68
Register Description
70
12 Timer/Counter Prescaler
77
Overview
77
Prescaler Reset
77
External Clock Source
77
Register Description
78
13 Analog Comparator
79
Analog Comparator Multiplexed Input
79
Register Description
80
14 Analog to Digital Converter
82
Features
82
Overview
82
Operation
83
Starting a Conversion
83
Prescaling and Conversion Timing
84
Changing Channel or Reference Selection
87
ADC Noise Canceler
88
Analog Input Circuitry
88
Analog Noise Canceling Techniques
89
ADC Accuracy Definitions
89
ADC Conversion Result
92
Register Description
92
15 Debugwire On-Chip Debug System
96
Features
96
Overview
96
Physical Interface
96
Software Break Points
97
Limitations of Debugwire
97
Register Description
97
16 Self-Programming the Flash
98
Performing Page Erase by SPM
98
Filling the Temporary Buffer
98
Performing a
99
Addressing the Flash During Self-Programming
99
EEPROM Write Prevents Writing to SPMCSR
100
Reading Fuse and Lock Bits from Firmware
100
Preventing Flash Corruption
101
Programming Time for Flash When Using SPM
101
Register Description
102
17 Memory Programming
103
Program and Data Memory Lock Bits
103
Fuse Bytes
104
Calibration Bytes
105
Signature Bytes
105
Page Size
105
Serial Programming
106
High-Voltage Serial Programming
109
Considerations for Efficient Programming
113
18 Electrical Characteristics
117
Absolute Maximum Ratings
117
DC Characteristics
117
Speed
118
Clock Characteristics
119
System and Reset Characteristics
120
Analog Comparator Characteristics
121
ADC Characteristics
121
Serial Programming Characteristics
122
High-Voltage Serial Programming Characteristics
123
19 Typical Characteristics
124
Supply Current of I/O Modules
124
Current Consumption in Active Mode
125
Current Consumption in Idle Mode
128
Current Consumption in Power-Down Mode
131
Current Consumption in Reset
132
Current Consumption of Peripheral Units
133
Pull-Up Resistors
135
Output Driver Strength (Low Power Pins)
138
Output Driver Strength (Regular Pins)
141
Input Thresholds and Hysteresis (for I/O Ports)
147
BOD, Bandgap and Reset
150
Internal Oscillator Speed
154
20 Register Summary
158
21 Instruction Set Summary
160
22 Ordering Information
162
23 Packaging Information
163
4
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Atmel ATtiny13A Specifications
General
Brand
Atmel
Model
ATtiny13A
Category
Microcontrollers
Language
English
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