L9659 datasheet(47/51 Pages) STMICROELECTRONICS

47 / 51 page

L9659

Functional description

Doc ID 022048 Rev 2

47/51

Bit [D8] POR status

0= Reset occurred. Bit cleared when read

1= Normal

With Bit D9=0 CFS

Bit D7:D4

‘0000’

Bit D3:

0 = FEN4 input or FEN4 latch timer inactive

1 = FEN4 input or FEN4 latch timer active

Bit D2:

0 = FEN3 input or FEN3 latch timer inactive

1 = FEN3 input or FEN3 latch timer active

Bit D1:

0 = FEN2 input or FEN2 latch timer inactive

1 = FEN2 input or FEN2 latch timer active

Bit D0:

0 = FEN1 input or FEN1 latch timer inactive

1 = FEN1 input or FEN1 latch timer active

Note:

The FEN status is the result of the state of the FEN input pin OR’d with the FEN latch timer.

The FEN latch timer will remain inactive until a transition of ‘1’ to ‘0’ on the FEN input

(assuming the pin was high for a minimum of 16µs). At that time the FEN latch timer will be

active and keep the internal FEN signal active based on the programmed time (0ms, 128ms,

256ms or 512ms) for that particular FEN function.

With Bit D9=1 CFS

Bit D7:

0 = Current through channel 7 is below IMEAS

1 = Current through channel 7 is above IMEAS

Bit D6:

0 = Current through channel 6 is below IMEAS

1 = Current through channel 6 is above IMEAS

Bit D5:

0 = Current through channel 5 is below IMEAS

1 = Current through channel 5 is above IMEAS

Bit D4:

0 = Current through channel 4 is below IMEAS

1 = Current through channel 4 is above IMEAS

Bit D3:

0 = Current through channel 3 is below IMEAS

1 = Current through channel 3 is above IMEAS

Bit D2:

0 = Current through channel 2 is below IMEAS

1 = Current through channel 2 is above IMEAS

Bit D1:

0 = Current through channel 1 is below IMEAS

1 = Current through channel 1 is above IMEAS

Bit D0:

0 = Current through channel 0 is below IMEAS

1 = Current through channel 0 is above IMEAS

Note:

current status for channel is captured on the falling edge of chip select

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