ISL76534 Datasheet, PDF (15/24 Pages) Intersil Corporation – 14-channel gamma references

ISL76534
Write Operation
Table 3 describes a write operation and Figures 26 and 27 shows
the write timing diagram.
I²C DATA
FROM MASTER
START
I²C DATA
FROM ISL76534
TABLE 3. WRITE TRANSACTION
I²C START Signal
NOTES
0xE8 or 0xEA
ACK
Send Device Address + R/W bit (depends on the state of A0 pin)
1110100 + 0, if A0 = LOW
1110101 + 0, if A0 = HIGH
Register Pointer
ACK
Register Pointer indicating starting register location to write to.
Register Pointer = 0x00 for Control Byte
Register Pointer = 0x01 for DAC 1 MSB/LSB data
Register Pointer = 0x02 for DAC 2 MSB/LSB data
...
Register Pointer = 0x0E for DAC 14 MSB/LSB data
Register Pointer = 0x0F for DAC 15 MSB/LSB data
Byte 1
For more information on the Register Pointer see Table 2 on page 14.
ACK
If Register Pointer = 0x00, Byte 1 is the Control Byte. When Register Pointer = 0x00 and Byte 1 = 0x06,
data is recalled from EEPROM and written into the DAC registers (RAM).
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
...
STOP
If Register Pointer = 0x01 or more, Byte 1 is the MSB byte of the DAC word
ACK
If Register Pointer = 0x00, Byte 2 is a null byte and will be ignored
If Register Pointer = 0x01 or more, Byte 2 is the LSB of the DAC word
ACK
MSB of DAC (1 + Register Pointer). Ex) Register Pointer = 0x00, MSB of DAC1
ACK
LSB of DAC (1 + Register Pointer). Ex) Register Pointer = 0x00, LSB of DAC1
ACK
MSB of DAC (2 + Register Pointer)
ACK
LSB of DAC (2 + Register Pointer)
...
The WRITE operation can be stopped at any time after a register has been written. The DAC channel output
is updated after ALL 10-bit channel data is received.
I²C STOP Signal
Submit Document Feedback ₁₅
FN8866.0
July 27, 2016