MP8864

– SYNCHRONOUS STEP-DOWN CONVERTER

MP8864 Rev. 1.02

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19

1/18/2018

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the MP8864. The MP8864 performs an update

on the falling edge of the LSB byte.

ADD sets the MP8864 address. The default 7-

bit address of the MP8864 is

“68” (hex) or

“1101000” (binary) if ADD is floated or pulled up

to VCC. The other MP8864 address is

“60” (hex)

or

“1100000” (binary) if ADD is pulled to ground.

When the master sends the address as an 8-bit

value, the 7-bit address should be followed by

“0/1”

to

indicate

write/read

operation

(see Table 1).

Table 1

—MP8864 address

ADD

Address (hex)

Address (binary)

A7

A6

A5

A4

A3

A2

A1

A0

(R/W)

Float or connected to

VCC

D0

1

1

0

1

0

0

0

0

D1

1

1

0

1

0

0

0

1

Connected to GND

C0

1

1

0

0

0

0

0

0

C1

1

1

0

0

0

0

0

1

MP8864 Register Address

The MP8864 contains four registers: register 00 to register 03. The four registers complete the following

actions:

 Register 00 sets the output voltage and decides whether the output voltage is controlled by the

 Register 01 sets the MP8864 operating features.

 Registers 02 and 03 are read registers only. Register 03 indicates the MP8864 status. The

register map is shown in the next section.