Plugged this RX in today and found the auto BPF has stopped working.
Testing with usbsoftrock and a 'scope showed that the PB4 pin is stuck high - it appears to be shorted to Vcc.
Otherwise the ATTiny85 appears to work...
$ usbsoftrock status
Version : 15.12
USB SerialID: PE0FKO-0
Startup Freq: 7.050000 (x 4.00)
Xtall Freq : 114.280000
Smooth Tune : 3500 PPM
Si570 I2C : 55 Hex
BPF Enabled: 1
Band BPF Si570
---------- --- -----------------
0.0.. 4.0 0 (F - 0.00) * 1.00000
4.0.. 8.0 1 (F - 0.00) * 1.00000
8.0..16.0 2 (F - 0.00) * 1.00000
16.0.. 3 (F - 0.00) * 1.00000
Removed U1 from it's socket and all voltages at the socket are correct.
What's the easiest way to get a replacement for U1 in the UK?
Nick
