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ADT7470 GPIO Status

Question asked by on Aug 20, 2015
Latest reply on Aug 24, 2015 by

Dear Sir,


      The ADT7470 Table 50. show "When GPIO is configured as an output, these bits are read/write. Setting these bits asserts the GPIO output. (Asserted can be high or low depending on the setting of GPIO4 polarity.)". We run below setting:


  1. Register 0x7F write "0x02" ==> set PWM3 as GPIO
  2. Register 0x80 write "0x0C" ==> set GPIO3 as output active high
  3. Register 0x81 write "0x0C" than 0x4C
  4. Register 0x81 write "0x0C"



But GPIO 3 ( PWM3 pin 8 ) level don't have any change (always high level) and Register 0x81 always read equal to "0x0C" at each step. Please help to check this issue. Thanks!