- Thu Sep 29, 2016 1:12 pm
#55880
Yes, some manufacturers specify their device address including the R/W, and some other not ...
- Thu Sep 29, 2016 4:17 pm
#55890
NXP and TI don't (at least for these devices). The I2C spec is also clear there's the address (7 bits) and then the data direction (rw) bit which.
martinayotte wrote:Yes, some manufacturers specify their device address including the R/W, and some other not ...
NXP and TI don't (at least for these devices). The I2C spec is also clear there's the address (7 bits) and then the data direction (rw) bit which.
esp8266 otb-iot software - https://github.com/piersfinlayson/otb-iot
esp8266 otb-iot documentation - https://otb-iot.readthedocs.io/
esp8266 related blog - http://www.packom.net/
esp8266 otb-iot documentation - https://otb-iot.readthedocs.io/
esp8266 related blog - http://www.packom.net/
- Thu Sep 29, 2016 4:33 pm
#55892
Not really, the TI PCF8574 datasheet I have (SCPS068J – JULY 2001 – REVISED MARCH 2015) is clearly showing 0x40 (decimal 64) on page 13.
The NXP datasheet I have (Rev. 5 — 27 May 2013) showing both 7 and 8 bits values on page 5.
But I don't bother since I'm fluent about reading specs and I always pay attention to such R/W details.
The NXP datasheet I have (Rev. 5 — 27 May 2013) showing both 7 and 8 bits values on page 5.
But I don't bother since I'm fluent about reading specs and I always pay attention to such R/W details.
