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CM71-00105-1E FUJITSU MICROELECTRONICS LIMITED 93
FR81 Family
CHAPTER 6 INSTRUCTION OVERVIEW
6.3
6.3 Data Format
This section describes the data type and format supported by FR81 Family CPU. In
addition to integer type supported by FR80 and earlier, single precision floating point
type has been added.
6.3.1 Data Format Used by Integer Type Instructions (Common
with All FR Family)
● Signed integer byte
Signed integer byte is represented as consecutive 8 bits. Bit 7 represents the sign bit (S), and "0" represents
positive or zero and "1" represents negative.
● Unsigned integer byte
Unsigned integer byte is represented as consecutive 8 bits.
● Signed integer half word
Signed integer half word is represented as consecutive 16 bits. Bit 15 represents the sign bit (S), and "0"
represents positive or zero and "1" represents negative.
● Unsigned integer half word
Unsigned integer half word is represented as consecutive 16 bits.
MSB LSB
76 0
S
MSB LSB
70
MSB LSB
15 14 0
S
MSB LSB
15 0