Hello,
Regarding to recovery on TCA6408A, my customer is asking some question.
They use power on reset for device reset. (RESET pin is connected to Vcci.)
When host is shutdown(SDA/SLA is stopped.) during writing to TCA6408A on I2C,
(Question)
(1) Will TCA6408A be hung-up on above condition?
(2) If so, they think that it can use the RESET pin (hardware) to recovery from hung-up.
As other solution, can it use I2C control (software) from host for recovery?
(3)About power sequence for power on reset
a) Keeping to input Vcci.
b) Vccp : ON -> OFF -> ON
Is above sequence correct for power on reset ?
They confirmed that after recovery from WDT(watched dog timer) in host(CPU) ,
TCA6408A is no response.
Regards,
Tao2199
