DEVICES INCORPORATED
LMU112
12 x 12-bit Parallel Multiplier
FIGURE 1A. INPUT FORMATS
AIN
BIN
Fractional Two’s Complement (TC = 1)
11 10 9
–20 2–1 2–2
(Sign)
210
2–9 2–10 2–11
11 10 9
–20 2–1 2–2
(Sign)
210
2–9 2–10 2–11
11 10 9
–211 210 29
(Sign)
Integer Two’s Complement (TC = 1)
210
22 21 20
11 10 9
–211 210 29
(Sign)
210
22 21 20
11 10 9
2–1 2–2 2–3
Unsigned Fractional (TC = 0)
210
2–10 2–11 2–12
11 10 9
2–1 2–2 2–3
210
2–10 2–11 2–12
11 10 9
211 210 29
Unsigned Integer (TC = 0)
210
22 21 20
11 10 9
211 210 29
210
22 21 20
FIGURE 1B. OUTPUT FORMATS
MSP
LSP
Fractional Two’s Complement
23 22 21
–20 2–1 2–2
(Sign)
14 13 12
2–9 2–10 2–11
11 10 9 8
2–12 2–13 2–14 2–15
23 22 21
–222 221 220
(Sign)
Integer Two’s Complement
14 13 12
213 212 211
11 10 9 8
210 29 28 27
Unsigned Fractional
23 22 21
2–1 2–2 2–3
14 13 12
2–10 2–11 2–12
11 10 9 8
2–13 2–14 2–15 2–16
23 22 21
223 222 221
Unsigned Integer
14 13 12
214 213 212
11 10 9 8
211 210 29 28
Multipliers
2
08/16/2000–LDS.112-K