TMC2246 Fairchild Semiconductor, TMC2246 Datasheet - Page 11

• Manufacturer Part Number: TMC2246
• Description: Image Filter 11 x 10 bit/ 60 MHz
• Manufacturer: Fairchild Semiconductor

TMC2246A
Table 2. Typical TMC2246A Operation Sequence
Notice in this example, operating in fractional two’s complement mode, that rounding is imposed on the first cycle only of an
accumulation. This avoids the propagation of accumulated roundoff errors.
REV. 1.0.3 9/11/00
CLK
0
1
2
3
4
5
6
7
8
D1(1) C1(1)
D1(2)
D1(3) C1(3)
D1(4) C1(4)
D1
-
C1
X
-
ENB1
0
1
0
0
-
D2(1) C2(1)
D2(2) C2(2)
D2(3) C2(3)
D2(4) C2(4)
D2
-
C2
-
ENB2
0
1
0
0
-
D3(1) C3(1)
D3(2)
D3(3)
D3(4) C3(4)
D3
-
C3
X
X
-
ENB3
0
1
1
0
-
D4(1) C4(1)
D4(2)
D4(3)
D4(4) C4(4)
D4
-
C4
X
X
-
ENB4 ACC
0
1
1
0
-
0
1
1
0
-
S(6)=S(5)+D1(2)C1(1)+D2(2)C2(1)
S(7)=S(6)+D1(3)C1(3)+D2(3)C2(3)
+D3(4)C3(4)+D4(4)C4(4)+2 -10
+D3(1)C3(1)+D4(1)C4(1)+ 2
S(5)=D1(1)C1(1)+D2(1)C2(1)
S(8)=D1(4)C1(4)+D2(4)C2(4)
+D3(2)C3(1)+D4(2)C4(1)
+D3(3)C3(1)+D4(3)C4(1)
PRODUCT SPECIFICATION
Sum
-
-
-
-10
11