MP6606

– 60V, 8-CHANNEL LOW-SIDE DRIVER WITH SERIAL INTERFACE

MP6606 Rev. 1.0

MonolithicPower.com

11

3/11/2022

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© 2022 MPS. All Rights Reserved.

Serial Interface Operation

A serial shift register interface is used to send

data to the MP6606 outputs. Data shifts out of

the SDO pin at the same time as the serial data

is clocked in (see Figure 2). This allows multiple

MP6606 devices to be connected in a daisy

chain fashion.

0

1

2

3

4

5

6

7

SDI

SDO

0

1

2

3

4

5

6

7

Shift Register

SCK

nSCS

Outputs

LATCH

SR Clock

Figure 2: Serial Interface Operation

The outputs do not immediately change as data

is shifted in or through the shift register. A rising

edge on the LATCH input pin latches the data

from the shift register into the outputs.

To write to a single device, 8 bits are clocked in

the MSB first, and the previous data is clocked

out.

Figure 3 shows how to write to a single device.

To write to two devices connected in a daisy

chain, 16 bits are written (see Figure 4).

Z

X

X

X

D0

D1

D2

X

SCK

SDI

SDO

Z

D3

D4

D5

D6

D7

P0

P1

P2

P3

P4

P5

P6

P7

nSCS

X

Previous Data

Figure 3: Writing to a Single Device

Z

X

X

X

D0

D1

D2

X

SCK

SDI

SDO

Z

D3

D4

D5

D6

D7

P0

P1

P2

P3

P4

P5

P6

P7

D8

D9

D10

D11

D12

D13

D14

D15

D15

D14

D13

D12

D11

D10

D9

D8

nSCS

X

Previous Data

Figure 4: Writing to Two Devices