- Source: Palm Serial
The Palm Serial were 3 successive proprietary 10-pin Serial connectors on the bottom of the first 3 series of models of PDAs from Palm, Inc. to provide serial communications: 1) pre-IrDA models; 2) the 1st IrDA models; 3) the 1st thin, metal-body models. In addition to Palm's models (and rebranded models like the IBM WorkPad series) similar serial connectors have been used in the Ericsson MC16 Palmtop and Handera equipment.
Pressing the HotSync button located at the base of the cradle closes a circuit between pins 2 and 7 which causes the activation of MUN2214 NPN transistor connected to pin 38 of the Motorola Dragonball CPU that provides a low signal on the IRQ1 UART, triggering the HotSync process.
On pin 8 when a modem connects to the Palm similarly closes a circuit pin 2 to activate another MUN2214 NPN transistor connected to pin 32 (GPIO UART) of the CPU to notify the presence of the modem.
PDA models that used the Palm Serial connector
Pilot 1000
Pilot 5000
PalmPilot Personal
PalmPilot Professional
Palm III
Palm IIIe
Palm IIIx
Palm IIIxe
Palm VII
Palm VIIx
Palm m100
Palm m105
TRGpro
Handera 330
Symbol 1500
Symbol 1550
External links
PCPD Serial Pin-Out Descriptions
Palm HotSync(tm) Cradle and serial port information
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