Dave: Yes, I've verified that I do not have the pins mixed-up (in regards to identifying pin 1 from left-to-right) with the help of a continuity tester. I cut the DB9 off of a cable attached to a 16 pin serial cradle and hardwired to my keypad. I had to swap out the 7.5K Ohm resistor connected to the ID pin (indicating serial cradle) and replace it with a 100K Ohm, 1% resistor (for my keypad RS232 peripheral), so I'm confident that I correctly identified pin 1. Plus the Palm documentation describes the orientation.
So at this point, would you say that the hardware is ok? Best Regards, Wayne -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Dave Lippincott Sent: Tuesday, July 22, 2003 3:42 PM To: Palm Developer Forum Subject: Re: Hardware 10 pin to 16 pin serial interface migration You've got the pins correct. Do you have pin 1 and 16 mixed up on the connector? ----- Original Message ----- From: "Wayne Pietluck" <[EMAIL PROTECTED]> To: "Palm Developer Forum" <[EMAIL PROTECTED]> Sent: Tuesday, July 22, 2003 3:16 PM Subject: Hardware 10 pin to 16 pin serial interface migration > Dave: > > You stated that "hardware migration should be as easy as rewiring the > keyboard to use the new connector and adding the proper Peripheral ID > resistor". Since you've "converted several hardware products", can you > please verify that my connections are correct? > > I was not able to access the links provided in a previous e-mail. But I'm > guessing that they were links to 1) "Electrical Interface (16-pin) > Connections for Palm Handhelds" which shows the connections between the > Palm, Serial Cradle and PC DB9; and 2) "Electrical Interface Signals for > Palm Handhelds" which was a table with headings: Pin #, Signal Name, and > Function. > http://www.palmos.com/dev/tech/hardware/palmhardware/electrical_interface(16 > -pin)signals.pdf & > http://www.palmos.com/dev/tech/hardware/palmhardware/electrical_interface(16 > -pin)connections.pdf. I used this information to rewire as shown here. > > Obviously the 10 pin docking connector must change to a 16 pin version. > > > > I've remapped the signals from the 10 pin to the 16 pin as follows: > > > > PALM 10 PALM 16 > > 1. DTR 15. DTR > > 2. 3.3Vdc 9. Vout > > 3. RD 10. RxD > > 4. RTS 14. RTS > > 5. TD 11. TxD > > 6. CTS 13. CTS > > 7. GP11 5. HS IRO > > 8. GP12 No 16 pin connection > > 9. Unused No 16 pin connection > > 10. SG 7. SG > > > > I've also made the following hardwired connections on the 16 pin > connector. > > 100K Ohm, 1% resistor (for a RS-232 Peripheral) from pin 8 (ID) to SG. > > Pin 12 (detect) to SG. > > > > The Palm asserts the correct handshaking signals to enable my device to > > transmit data, but the data transmitted from my peripheral is still not > > recognized by the Palm 500. > > Did I rewire correctly? My functional 10-pin interface keypad emulates > Palm's Stowaway fold-up keyboard. > > Best Regards, > > Wayne > -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/ -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
