display using DS90UB926Q - Q1, host is DS90UB927Q, when making display principle diagram, I defined the DS90UB926Q - Q1 GPO_REG8 / I2S_CLK 1 foot to the brightness of the display backlight PWM control signal, define 30 feet I2S_WC/GPO_REG7 for touch-key lamp brightness PWM control signal, the two signals are all want to pass the host DS90UB927Q passthrough, so ask you,Is the configuration of the pin of DS90UB927Q on the host side necessary to correspond with the configuration of the display pin to passthrough?For example, the first foot GPO_REG8 / I2S_CLK of the display board ds90ub926q-q1 corresponds to the second foot I2S_CLK/GPIO_REG8 of the main board DS90UB927Q, while the 30th foot I2S_WC/GPO_REG7 of the display board ds90ub926q-q1.The first leg of DS90UB927Q corresponds to 2S_WC/GPIO_REG7 of the motherboard.
Only display board and motherboard through the definition of the port must correspond?Should agree?To passthrough?Is it like this?Since all the GPIO is already occupied, the PWM signal wants to pass through these feet,
