AD7992 datasheet(23/29 Pages) AD

23 / 29 page

AD7992

Rev. 0 | Page 22 of 28

WRITING TWO BYTES OF DATA TO A LIMIT

Each of the limit registers and hysteresis registers are 12-bit

registers, so two bytes of data are required to write a value to

any one of them. Writing two bytes of data to one of these

registers consists of the serial bus write address, the chosen

limit register address written to the address pointer register,

followed by two data bytes written to the selected data register.

See Figure 27.

If the master is write-addressing the AD7992, it can write to

more than one register with out re-addressing the ADC. After

the first write operation has completed for the first data register,

during the next byte, the master writes to the address pointer

byte to select the next data register for a write operation. This

eliminates the need to re-address the device in order to write to

another data register.

SDA

ACK. BY

AD7992

ACK. BY

AD7992

R/W

SCL

D1/0

D0/0

ACK. BY

AD7992

STOP BY

MASTER

LEAST SIGNIFICANT DATA BYTE

MOST SIGNIFICANT DATA BYTE

SCL (CONTINUED)

SDA (CONTINUED)

FRAME 1

SERIAL BUS ADDRESS BYTE

START BY

MASTER

FRAME 2

ADDRESS POINTER REGISTER

D10

D11

ACK. BY

AD7992

Figure 27. Two-Byte Write Sequence

AD7992 Datasheet(PDF) 23 Page - Analog Devices

AD7992 Datasheet(HTML) 23 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

Datasheet Download

Link URL