MAX14521E_15 Datasheet, PDF (17/21 Pages) Maxim Integrated Products – Quad, High-Voltage EL Lamp Driver with I2C Interface

MAX14521E
Quad, High-Voltage EL Lamp Driver
with I²C Interface
The second byte transmitted from the master configures
the MAX14521E internal register address pointer. The
pointer tells the MAX14521E where to write the next byte
of data. An acknowledge pulse is sent by the MAX14521E
upon receipt of the address pointer data.
The third byte sent to the MAX14521E contains the data
that will be written to the chosen register. An acknowledge
pulse from the MAX14521E signals receipt of the data
byte. The address pointer autoincrements to the next
register address after each received data byte. This auto-
increment feature allows a master to write to sequential
registers within one continuous frame. Attempting to write
to register addresses higher than 0x0B results in repeated
writes of 0x0B. Figure 5 illustrates how to write to multiple
registers with one frame. The master signals the end of
transmission by issuing a STOP condition.
ACKNOWLEDGE FROM MAX14521E
ACKNOWLEDGE FROM MAX14521E
S
SLAVE ADDRESS
0A
REGISTER ADDRESS
R/W
Figure 4. Writing One Byte of Data to the MAX14521E
ACKNOWLEDGE FROM MAX14521E
B7 B6 B5 B4 B3 B2 B1 B0
A
DATA BYTE
AP
1 BYTE
AUTOINCREMENT INTERNAL
REGISTER ADDRESS POINTER
ACKNOWLEDGE FROM MAX14521E
S SLAVE ADDRESS
0A
R/W
ACKNOWLEDGE FROM MAX14521E
ACKNOWLEDGE FROM MAX14521E
ACKNOWLEDGE FROM
MAX14521E
REGISTER ADDRESS
B7 B6 B5 B4 B3 B2 B1 B0
A
DATA BYTE 1
A
1 BYTE
B7 B6 B5 B4 B3 B2 B1 B0
DATA BYTE n
1 BYTE
AP
AUTOINCREMENT INTERNAL
REGISTER ADDRESS POINTER
Figure 5. Writing n-Bytes of Data to the MAX14521E
www.maximintegrated.com
Maxim Integrated │  17