9 pin D-SUB female connector at the computer
10 pin PALM special connector at the PALM (keypad down)
This page documents the wiring of the Palm Pilot serial HotSync cradle, showing how the 9-pin D-SUB female connector at the PC side maps to the proprietary 10-pin Palm connector on the device. The cradle carries serial data lines, ground, and the HotSync trigger signals specific to early Palm PDAs. Only the pins listed in the table are covered.
| DB9F | Signal | Cradle | Signal |
|---|---|---|---|
| 1 | CD | ||
| 2 | RXD | 6 | TXD |
| 3 | TXD | 8 | RXD |
| 4 | DTR | ||
| 5 | GND | 1 | GND |
| 6 | DSR | 10 | Gen.Purpose Output |
| 7 | RTS | 5 | CTS |
| 8 | CTS | 7 | RTS |
| 9 | RI | ||
| Shield | 10nF capacitor to ground | ||
| 4 | HotSync switch | ||
| 9 | HotSync switch live (to 3.3V via 330 ohms) | ||
| 3 | Gen.Purpose Input | ||
| 2 | NC |
Notes
Pin numbers in the Cradle column refer to the 10-pin Palm connector on the device; pins not listed on the DB9F side are not connected through the cradle.
References
- Palm, Inc. — Electrical Interface (10-Pin) Connections (2001) — Palm, Inc.; serial cradle DB-9 wiring.