Monterey AUM6868
Overview
AUM6868 is a keyboard encoder chip found in some Monterey keyboards. The manufacturer and the derivation of the model number are not known. The pinout to the chip was provided during FCC product registration and is found in the K290 FCC test report. The chart for this chip shows it labelled simply “MONTEREY AUM6868”. Considering that this chip is from 1995, it is most likely going to be a microcontroller-based encoder.
Pinout
Pin | Designation | Function |
---|---|---|
1 | GND | |
2 | ||
3 | DATA | PS/2 data |
4 | CLK | PS/2 clock |
5 | P30 | Matrix connection S16 |
6 | P31 | Matrix connection S17 |
7–10 | ||
11–18 | P01–P07 | Matrix connections S0–S7 |
19–26 | P10–P17 | Matrix connections S8–S15 |
27–34 | P20–P27 | Matrix connections R0–R7 |
35 | LED0 | Fed from VCC via scroll lock LED |
36 | LED1 | Fed from VCC via num lock LED |
37 | LED2 | Fed from VCC via caps lock LED |
38 | VOO | Stabilised VCC via a 4.7 kΩ resistor (R2), C1 (104) and C2 (10 µF) to ground (pin 1) |
39 | R_OSC | Fed from VCC via 47 kΩ resistor (R1) |
40 |
Keyboards
- K290 (per the FCC test report)
- Monterey K108 (chip dated week 49 1995)
Documentation
- Basic circuit & matrix for Windows 95 K/B (AUM6868 pinout and matrix layout), 1995-09-20 (from the Monterey K290 FCC test report)