MAX14515 Ver la hoja de datos (PDF) - Maxim Integrated

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MAX14515

High-Voltage Liquid Lens Driver

Maxim Integrated 

High-Voltage Liquid Lens Driver

SDA

SCL

Figure 5. Bit Transfer

DATA LINE STABLE;

DATA VALID

CHANGE OF DATA

ALLOWED

START

CONDITION

SCL

1

2

CLOCK PULSE FOR

ACKNOWLEDGE

8

9

SDA

BY

TRANSMITTER

SDA

BY

RECEIVER

S

Figure 6. Acknowledge

Slave Address

The MAX14515 has a 7-bit long slave address. The bit

following a 7-bit slave address is the R/W bit, which is

low for a write command and high for a read command.

The slave address is 0xEC for write commands and

0xED for read commands (Figure 7).

Format for Writing

A write to the MAX14515 comprises the transmission of

the slave address with the R/W bit set to zero, followed

by at least 1 byte of information. The first byte of infor-

mation is the register address or command byte. The

register address determines which register of the

MAX14515 is to be written by the next byte, if received.

If a STOP condition is detected after the register

address is received, then the MAX14515 takes no fur-

ther action beyond storing the register address (Figure

8). Any bytes received after the register address are

data bytes. The first data byte goes into the register

selected by the register address and subsequent data

bytes go into subsequent registers (Figure 9). If multi-

ple data bytes are transmitted before a STOP condition,

these bytes are stored in subsequent registers

because the register address autoincrements.

Format for Reading

The MAX14515 is read using the internally stored regis-

ter address as an address pointer, the same way the

stored register address is used as an address pointer

for a write. The pointer autoincrements after each data

byte is read using the same rules as for a write. Thus, a

read is initiated by first configuring the register address

by performing a write (Figure 10). The master can now

read consecutive bytes from the MAX14515, with the

first data byte being read from the register address

pointed by the previously written register address.

Once the master sounds a NACK, the MAX14515 stops

sending valid data.

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