MAX14521E Datasheet, PDF (17/20 Pages) Maxim Integrated Products – Quad, High-Voltage EL Lamp Driver with I2C Interface

Quad, High-Voltage EL Lamp Driver
with I²C Interface
The second byte transmitted from the master config-
ures 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 autoincre-
ments to the next register address after each received
data byte. This autoincrement 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
ACKNOWLEDGE FROM MAX14521E
ACKNOWLEDGE FROM MAX14521E
ACKNOWLEDGE FROM MAX14521E
B7 B6 B5 B4 B3 B2 B1 B0
B7 B6 B5 B4 B3 B2 B1 B0
S SLAVE ADDRESS
0A
REGISTER ADDRESS
A
R/W
DATA BYTE 1
A
1 BYTE
AUTOINCREMENT INTERNAL
REGISTER ADDRESS POINTER
DATA BYTE n
1 BYTE
AP
Figure 5. Writing n-Bytes of Data to the MAX14521E
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