I have an Arty A7, a PS/2 PMOD and an old PS/2 keyboard. At 3.3V this keyboard doesn't show any sign of life. I suspect it actually needs 5V.
I see there's a jumper on the PMOD that allows you to hook up an external 5V supply. Looking at the schematic however, I don't see how this can work. There's no level shifter on the PMOD. The data and clock lines would get pulled up to 5V and damage the FPGA.
Am I supposed to hook up the PS/2 PMOD to a level shifter PMOD if I want to use it at 5V?
Btw, isn't PS/2 Vcc supposed to be 5V? Is the idea of this PS/2 PMOD to hook up a PS/2 peripheral, which is supposed to run at 5V, to 3V3 instead and hope for the best?
Question
epsilon
Hi,
I have an Arty A7, a PS/2 PMOD and an old PS/2 keyboard. At 3.3V this keyboard doesn't show any sign of life. I suspect it actually needs 5V.
I see there's a jumper on the PMOD that allows you to hook up an external 5V supply. Looking at the schematic however, I don't see how this can work. There's no level shifter on the PMOD. The data and clock lines would get pulled up to 5V and damage the FPGA.
Am I supposed to hook up the PS/2 PMOD to a level shifter PMOD if I want to use it at 5V?
Btw, isn't PS/2 Vcc supposed to be 5V? Is the idea of this PS/2 PMOD to hook up a PS/2 peripheral, which is supposed to run at 5V, to 3V3 instead and hope for the best?
Thanks for any help,
Ruben.
Link to comment
Share on other sites
3 answers to this question
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now