Part Number: PGA900
Other Parts Discussed in Thread: USB2ANY
Hi team
My customer wants to know how to use UART by PGA900.
Would you tell me about their issue?
The issue
Although the external UART is of 3.3 V, the RXD port of PGA 900 is in a state where it does not rise to 3.3 V even if an external UART is connected.
The use case
PGA900 connected to PC via the USB2ANY.
The program is written in Dev RAM by PGA900EVM GUI.
But, the RXD port of PGA900 does not work normally, when they had tried to debug writing a program that the PGA 900 received serial data from the outside by UART using GUI.
It seems to be competed with SPI communication of USB2ANY.
The communication method of the GUI uses IIC, and when confirming the contents of the setting register of PGA 900, it was the same as the value set by the written program.
PIN_MUX :1 (selected the UART)
UART_CONFIG :0 (No parity, 1 stop bit)
UART_EN :1 (allowed the UART)
BOUD_RATE :25 (baud rate is configured in 9600)
It is thought that it is difficult to check the operation of UART in debug using Dev RAM, but how about it?
Best regards
Hayashi
