C8051F360DK Silicon Laboratories Inc, C8051F360DK Datasheet - Page 118
![KIT DEV FOR C8051F360 FAMILY](/photos/9/23/92333/c8051f360dk_sml.jpg)
C8051F360DK
Manufacturer Part Number
C8051F360DK
Description
KIT DEV FOR C8051F360 FAMILY
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F360DK
Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F36x
Interface Type
USB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F360, F361, F362, F363, F364, F365, F366, F367, F368, F369
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1410
- Current page: 118 of 288
- Download datasheet (3Mb)
C8051F360/1/2/3/4/5/6/7/8/9
11.2. Integer and Fractional Math
MAC0 is capable of interpreting the 16-bit inputs stored in MAC0A and MAC0B as signed integers or as
signed fractional numbers. When the MAC0FM bit (MAC0CF.1) is cleared to ‘0’, the inputs are treated as
16-bit, 2’s complement, integer values. After the operation, the accumulator will contain a 40-bit, 2’s com-
plement, integer value. Figure 11.2 shows how integers are stored in the SFRs.
When the MAC0FM bit is set to ‘1’, the inputs are treated at 16-bit, 2’s complement, fractional values. The
decimal point is located between bits 15 and 14 of the data word. After the operation, the accumulator will
contain a 40-bit, 2’s complement, fractional value, with the decimal point located between bits 31 and 30.
Figure 11.3 shows how fractional numbers are stored in the SFRs.
118
-(2
-(2
* The MAC0RND register contains the 16 LSBs of a two's complement number. The MAC0N Flag can be
used to determine the sign of the MAC0RND register.
-(2
* -2
-1
15
39
8
)
)
)
2
2
2
2
14
38
1
-1
7
MAC0OVR
MAC0OVR
2
2
2
13
-1
-2
Figure 11.3. Fractional Mode Data Representation
High Byte
High Byte
2
2
2
-2
Figure 11.2. Integer Mode Data Representation
12
-3
2
2
33
High Byte
2
2
2
2
-3
11
-4
2
2
32
MAC0A, and MAC0B Bit Weighting
MAC0A and MAC0B Bit Weighting
1
2
MAC0 Accumulator Bit Weighting
MAC0 Accumulator Bit Weighting
2
-4
2
10
-5
2
MAC0RND Bit Weighting
2
2
31
MAC0ACC3 : MAC0ACC2 : MAC0ACC1 : MAC0ACC0
MAC0ACC3 : MAC0ACC2 : MAC0ACC1 : MAC0ACC0
0
-5
2
2
-6
9
2
2
2
30
-1
-6
2
2
Rev. 1.0
-7
8
2
2
2
-7
29
-2
2
2
-8
7
2
2
2
28
-8
-3
2
2
-9
6
2
-9
2
2
-10
5
2
-10
Low Byte
Low Byte
2
2
2
2
-11
-27
Low Byte
4
4
2
-11
2
2
2
2
-12
-28
2
3
3
-12
2
2
2
2
2
-13
-29
2
2
-13
2
2
2
2
2
-14
-30
-14
1
1
2
2
2
2
2
-15
-31
-15
0
0
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