Hi all,
I have a picaxe 40x1 and it can connect to the picaxe programmer, but it woudn't download the first byte of the program.
I have correctly insalled the download circuit and when i have investigated, I have found that the serial in (rxd) pin seems to be almost directly internally connected to it's vcc power rail. I tried pulling it down to gnd (0v) with a resistor as low as 82 ohms (it warmed up but the picaxe chip didn't) and it's voltage only went as low as 4.7v (vcc=4.9v regulated). The serial out (txd) works normally (as rxd is high, the txd flashes like how i have investigated on a working picaxe chip with it's rxd high)
Does this mean the chip is damaged or can something be done?
I have a picaxe 40x1 and it can connect to the picaxe programmer, but it woudn't download the first byte of the program.
I have correctly insalled the download circuit and when i have investigated, I have found that the serial in (rxd) pin seems to be almost directly internally connected to it's vcc power rail. I tried pulling it down to gnd (0v) with a resistor as low as 82 ohms (it warmed up but the picaxe chip didn't) and it's voltage only went as low as 4.7v (vcc=4.9v regulated). The serial out (txd) works normally (as rxd is high, the txd flashes like how i have investigated on a working picaxe chip with it's rxd high)
Does this mean the chip is damaged or can something be done?