Functional Description
Question 1
When using the tools to change the value of bits in the PA port register from "0" to "1", why when after checking the content of the register, I cannot see that the PA pin has changed its value.
Answer
When changing a specific bit value on the PA data register, only bits that are setup as outputs will be changed. Bits to be changed must first be setup as outputs by writing a zero to the corresponding bit of the PAC register.
Application Description
Question 1
Can Endpoint 0 in the HT82M99E be an INPUT PIPE?
Answer
Endpoint 0 in the HT82M99E can only be used to control transmission, however HID type GETREPORT can be used in Endpoint 0 to obtain data.
Others
Question 1
In an application example, “Using the HT82M99E to implement an RS232 to USB interface converter”, why does the USB bus send an error and the oscillator in the HT82M99E stop running?
Answer
In this example, after the USB bus sends an error, the USB bus will enter the suspend mode. At this time the program will jump to the HALT instruction, which after execution will place the MCU into the Power-down mode, where the oscillator stops running.
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