2. Notation of Numbers and Symbols
Weight in data notation: Left is high-order column, right is low-order column
Active low notation:
xxxZ (capital letter Z after pin name or signal name)
or xxx_N (capital letter _N after pin name or signal name)
or xxnx (pin name or signal name contains small letter n)
Note:
Explanation of (Note) in the text
Caution:
Item deserving extra attention
Remark:
Supplementary explanation to the text
Numeric notation:
Binary … xxxx , xxxxB or n’bxxxx (n bits)
Decimal … xxxx
Hexadecimal … xxxxH or n’hxxxx (n bits)
Prefixes representing powers of 2 (address space, memory capacity):
K (kilo)… 2
10
= 1024
M (mega)… 2
20
= 1024
2
G (giga)… 2
30
= 1024
3
Data Type:
Word … 32 bits
Halfword … 16 bits
Byte … 8 bits