C Numeric Formats
C – 2
15 14 13
• • •
2 10
–(2 ) 2 2 2 2 2
15 14 13 2 1 0
Sign
Bit
Weight
Bit
Signed Integer
15 14 13
• • •
2 10
222 222
15 14 13 2 1 0
Weight
Bit
Unsigned Integer
Radix Point
Radix Point
Figure C.1 Integer Format
Figure C.2 Example Of Fractional Format
15 14 13
• • •
2 10
–(2 ) 2 2 2 2 2
12 11 10 –1 –2 –3
Sign
Bit
Weight
Bit
Signed Fractional (13.3)
15 14 13
• • •
2 10
222 222
12 11 10 –1 –2 –3
Weight
Bit
Unsigned Fractional (13.3)
4 3
22
10
43
22
10
Radix Point
Radix Point
In a fractional format, the assumed radix point lies within the number, so
that some or all of the magnitude bits have a weight of less than 1. In the
format shown in Figure C.2, the assumed radix point lies to the left of the
3 LSBs, and the bits have the weights indicated.