TMC2246AH5C 参数 Datasheet PDF下载

TMC2246A

PRODUCT SPECIFICATION

Table 2. Typical TMC2246A Operation Sequence

CLK

0

1

2

3

4

5

6

7

8

D1

-

D1(2)

C1

-

X

ENB1

0

1

0

0

-

D2

-

C2

-

ENB2

0

1

0

0

-

D3

-

D3(2)

D3(3)

C3

-

X

X

ENB3

0

1

1

0

-

D4

-

D4(2)

D4(3)

C4

-

X

X

ENB4 ACC

0

1

1

0

-

-

0

1

1

0

S(5)=D1(1)C1(1)+D2(1)C2(1)

+D3(1)C3(1)+D4(1)C4(1)+ 2

-10

S(6)=S(5)+D1(2)C1(1)+D2(2)C2(1)

+D3(2)C3(1)+D4(2)C4(1)

S(7)=S(6)+D1(3)C1(3)+D2(3)C2(3)

+D3(3)C3(1)+D4(3)C4(1)

S(8)=D1(4)C1(4)+D2(4)C2(4)

+D3(4)C3(4)+D4(4)C4(4)+2-10

Sum

-

-

-

D1(1) C1(1)

D1(3) C1(3)

D1(4) C1(4)

D2(1) C2(1)

D2(2) C2(2)

D2(3) C2(3)

D2(4) C2(4)

D3(1) C3(1)

D4(1) C4(1)

D3(4) C3(4)

D4(4) C4(4)

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

11