| Pin | Signal | Description |
| 3 | GND | shorted by R=44.5KOhm to pin 18 when keyboard attached |
| 4 | Rx | also Tx for keyboard |
| 5 | Tx | |
| 8 | Ri | |
| 9 | CTS | |
| 10 | DTR | |
| 11 | DSR | |
| 16 | Vcc | power +5V, VDD for keyboard, +4.2V charging by i700 12V charger |
| 17 | GND | |
| 15 | +1.5V charging by i700 12V charger | |
| 18 | +0.66V charging by i700 12V charger | |
| 19 | +6V charging by i700 12V charger |
i700 Audio Jack Pinouts
tip = mike
ring = left audio
base = ground
outer ring = right audio
Samsung I700 charger (should show charger icon when connected). NOT tested!
2 - R1=120k to pin 3
3 - GND
4 - +V (4.3V-4.6V, not more)
5 - R2=2.2k to pin 4