MAX14521E Datasheet, PDF(18/20 Page) Maxim Integrated Products – Quad, High-Voltage EL Lamp Driver with I2C Interface

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

MAX14521E Datasheet, PDF (18/20 Pages) Maxim Integrated Products – Quad, High-Voltage EL Lamp Driver with I2C Interface

◁

Quad, High-Voltage EL Lamp Driver

with I2C Interface

Read Data Format

Send the slave address with the R/W set to 1 to initiate

a read operation. The MAX14521E acknowledges

receipt of its slave address by pulling SDA low during

the 9th SCL clock pulse. A START command followed

by a read command resets the address pointer to reg-

ister 0x00. The first byte transmitted from the

MAX14521E will be the contents of register 0x00.

Transmitted data is valid on the rising edge of the mas-

ter-generated serial clock (SCL). The address pointer

autoincrements after each read data byte. This auto-

increment feature allows all registers to be read

sequentially within one continuous frame. A STOP con-

dition can be issued after any number of read data

bytes. If a STOP condition is issued followed by anoth-

er read operation, the first data byte to be read will be

from register 0x00 and subsequent reads will auto-

increment the address pointer until the next STOP con-

dition. The address pointer can be preset to a specific

presets the address pointer by first sending the

MAX14521Eâs slave address with the R/W bit set to 0

followed by the register address. A REPEATED START

condition is then sent, followed by the slave address

with the R/W set to 1. The MAX14521E transmits the

contents of the specified register. The address pointer

autoincrements after transmitting the first byte.

Attempting to read from register addresses higher than

0x0B results in repeated reads of 0x0B. The master

acknowledges receipt of each read byte during the

acknowledge clock pulse. The master must acknowl-

edge all correctly received bytes except the last byte.

The final byte must be followed by a not acknowledge

from the master and then a STOP condition. Figure 6

illustrates the frame format for reading one byte from

the MAX14521E. Figure 7 illustrates the frame format

for reading multiple bytes from the MAX14521E.

NOT ACKNOWLEDGE FROM MASTER

ACKNOWLEDGE FROM MAX14521E ACKNOWLEDGE FROM MAX14521E ACKNOWLEDGE FROM MAX14521E

S SLAVE ADDRESS

R/W

A Sr

REPEATED START

SLAVE ADDRESS

R/W

DATA BYTE

1 BYTE

AUTOINCREMENT INTERNAL

Figure 6. Reading One Indexed Byte of Data from the MAX14521E