STK1000/Hardware Revisions
From AVRFreaks Wiki
This page lists changes between different hardware revisions of STK1000. Changes are listed under the respective PCB revision number. This number can be seen on the bottom right corner of the STK1000 Printed Circuit Board (PCB).
PCB revision B
This was the first revision of STK1000 released to the public.
Serial numbers shall be visible on a sticker on STK1000.
Serial numbers 1-50
STK1000 boards with serial number 1-50 was shipped so some early customers and they have some minor errors. The following component values have incorrect values. This have been fixed for boards with serial number 51 and up.
Component | Mounted value | Correct value |
---|---|---|
R31 | 38k | 330k |
R32 | 4k7 | 47k |
R60 | not mounted | 10k |
R62 | 180k | 750k |
R63 | 12k | 56k |
C83 | 0.22uF | 2.2nF |
C84 | not mounted | 220pF |
The effect of these incorrect values was that the LCD power supply did not function properly and flickering was seen on the LCD screen.
Silk screen text showing row A and B on the PCI style expansion connector J18 was updated after the batch with serial numbers 1-50 to match the common naming of row A and B. The schematic was also updated to reflect this change. The PCI connector page show the connection on STK1000 boards with serial number 51 and higher.