Data Sheet

1055
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
40. About This Document
40.1 Conventions
40.1.1 Numerical Notation
Table 40-1. Numerical notation
40.1.2 Memory Size and Type
40.1.3 Frequency and Time
165 Decimal number
0101b 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 40-2. 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
Table 40-3. 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
ms millisecond
µs microsecond
ns nanosecond