ST20-C1 STMICROELECTRONICS [STMicroelectronics], ST20-C1 Datasheet - Page 61

• Manufacturer Part Number: ST20-C1
• Description: Instruction Set Reference Manual
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

final accum ulator. This is shown in Figure 5.3.
Shifting the coefficient b y 1 extra place (i.e. 9 places) is used to normalize a 2.14
(Q14) coefficient to the correct position for the binary point. This is shown in Figure
5.4.
15
15
47
47
X data value
X data value
Figure 5.3 Coefficient scaling with mac_mode set to 2
Figure 5.4 Coefficient scaling with mac_mode set to 3
40
39
Add to internal accumulator
Add to internal accumulator
0
0
24
15
15
23
9
8
Y data value
Y data value
<< 8
<< 9
0
0
5 Multiply accumulate
0
8
0
9
0
0
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