ZHCSRN7A January 2023 – September 2023 DAC539G2-Q1
PRODUCTION DATA
Table 7-6 depicts the address byte, the first byte received from the controller device following the start condition. The first four bits (MSBs) of the address are factory preset to 0b1001. The next three bits of the address are controlled by the A0 pin. The A0 pin input can be connected to VDD, AGND, SCL, or SDA. The A0 pin is sampled during the first byte of each data frame to determine the address. The device latches the value of the address pin, and consequently responds to that particular address according to Table 7-7.
COMMENT | MSB | LSB | ||||||
---|---|---|---|---|---|---|---|---|
— | AD6 | AD5 | AD4 | AD3 | AD2 | AD1 | AD0 | R/W |
General address | 1 | 0 | 0 | 1 | See Table 7-7 (target address column) |
0 or 1 | ||
Broadcast address | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 |
TARGET ADDRESS | A0 PIN |
---|---|
000 | AGND |
001 | VDD |
010 | SDA |
011 | SCL |
The DAC539G2-Q1 supports broadcast addressing, which is used for synchronously updating or powering down multiple DAC539G2-Q1 devices. When the broadcast address is used, the DAC539G2-Q1 responds regardless of the address pin state. Broadcast is supported only in write mode.