TMC2249A-1 查看數據表（PDF） - Raytheon Company
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TMC2249A-1 Datasheet PDF : 16 Pages
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PRODUCT SPECIFICATION
TMC2249A
Functional Description
The TMC2249A performs the summation of products
described by the formula:
S(N+5) = A(N-ADEL) × B(N-BDEL) × (-1NEG1(N)) +
C(N-CDEL) × D(N-DDEL) × (-1NEG2(N)) +
CAS(N+3 × FT)
where ADEL through DDEL range from 1 to 16 pipe delays.
All inputs and controls utilize pipeline delay registers to
maintain synchronicity with the data input during that clock,
except when the Cascade data input is routed directly to the
accumulator by use of the Feedthrough control. One-half
LSB rounding to 16 bits may be performed on the sum of
products while summing with the cascade input data.
The user may access either the upper or lower 16 bits of the
24-bit accumulator by swapping overlapping registers. The
output bus has an asynchronous high-impedance enable, to
simplify interfacing to complex systems.
Pin Assignments
120 Pin Metric Quad Flat Pack, KE Package
120
1
30
31
91
90
61
60
65-3543-06
Pin Name Pin Name Pin Name Pin Name
1 CLK
31 BDEL2 61 ADEL3 91 C1
2 ACC 32 BDEL3 62 ADEL2 92 C2
3
NEG1 33 ENB
63 ADEL1 93
C3
4 NEG2 34 B0
64 ADEL0 94 C4
5 RND 35 B1
65 NC
95 C5
6 S15
36 B2
66 CAS15 96 C6
7 S14
37 B3
67 CAS14 97 C7
8 GND 38 B4
68 CAS13 98 C8
9 S13
39 B5
69 CAS12 99 C9
10 S12
40 B6
70 CAS11 100 C10
11 S11
41 B7
71 CAS10 101 C11
12 VDD 42 GND 72 GND 102 VDD
13 S10
43 B8
73 CAS9 103 D11
14 S9
44 B9
74 CAS8 104 D10
15 S8
45 B10
75 CAS7 105 D9
16 GND 46 VDD 76 CAS6 106 GND
17 S7
47 B11
77 CAS5 107 D8
18 S8
48 A11
78 CAS4 108 D7
19 S5
49 A10
79 CAS3 109 D6
20 VDD 50 A9
80 CAS2 110 D5
21 S4
51 A8
81 CAS1 111 D4
22 S3
52 A7
82 CAS0 112 D3
23 S2
53 A6
83 CASEN 113 D2
24 GND 54 A5
84 FT
114 D1
25 S1
55 A4
85 CDEL0 115 D0
26 S0
56 A3
86 CDEL1 116 END
27 OE
57 A2
87 CDEL2 117 DDEL3
28 SWAP 58 A1
88 CDEL3 118 DDEL2
29 BDEL0 59 A0
89 ENC
119 DDEL1
30 BDEL1 60 ENA
90 C0
120 DDEL0
3
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