Техническая Спецификация для Atmel Xplained Pro Evaluation Kit ATSAMD20-XPRO ATSAMD20-XPRO
Модели
ATSAMD20-XPRO
649
Atmel | SMART SAM D20 [DATASHEET]
Atmel-42129K–SAM-D20_datasheet–06/2014
Appendix A. Conventions
A.1
Numerical Notation
A.2
Memory Size and Type
A.3
Frequency and Time
Table A-1.
Numerical Notation
Symbol
Description
165
Decimal number
0b0101
Binary number (example 0b0101 = 5 decimal)
0101
Binary numbers are given without suffix if unambiguous
0x3B24
Hexadecimal number
X
Represents an unknown or don't care value
Z
Represents a high-impedance (floating) state for either a signal or a bus
Table A-2.
Memory Size and Bit Rate
Symbol
Description
KB (kbyte)
kilobyte (2
10
= 1024)
MB (Mbyte)
megabyte (2
20
= 1024*1024)
GB (Gbyte)
gigabyte (2
30
= 1024*1024*1024)
b
bit (binary 0 or 1)
B
byte (8 bits)
1kbit/s
1,000 bit/s rate (not 1,024 bit/s)
1Mbit/s
1,000,000 bit/s rate
1Gbit/s
1,000,000,000 bit/s rate
word
32 bit
half-word
16 bit
Table A-3.
Frequency and Time
Symbol
Description
kHz
1kHz = 10
3
Hz = 1,000Hz
MHz
10
6
= 1,000,000Hz
GHz
10
9
= 1,000,000,000Hz
s
second