The 15 pin connector (near crystal oscillator) is used for JTAG programming the XC8572XL (XC) and the PSD813F1V (PSD). According to my analysis the pinout is the following:
1) Vcc/+5V - goes to pin 5 of MAX882 voltage regulator: its 3.3V output powers XC and PSD 2) Ground (GND) 3) PSD pin PC6 (JTAG-TDO) 4) PSD pin PC5 (JTAG-TDI) 5) PSD pin PC4 (JTAG-/TERR) [on datasheet erroneously shown connected to Vcc] 6) PSD pin PC3 (JTAG-/TSTAT) 7) PSD pin PC1 (JTAG-TCK) 8) PSD pin PC0 (JTAG-TMS) 9) no known connection 10) no known connection 11) XC pin 30 (JTAG-TCK) 12) XC pin 28 (JTAG-TDI) 13) XC pin 53 (JTAG-TDO) 14) XC pin 29 (JTAG-TMS) 15) no known connection I think the +5V on pin 1 should be enough to program the two chips without requiring any power on the DB9 connector. My MQP Pin-Master 48 programmer SHOULD be able (via JTAG) to read the FLASH/EEPROM contents of the PSD813F1V: during the weekend I will try to dump the firmware of the FE-5680A. If the PSD chip is JTAG read protected I will have to desolder it and try to read its contents directly accessing Address/Data lines. at the following address you will find a (rather big) annotated picture regarding the connector pinout: <http://www.rhodiatoce.com/pics/time-nuts/FE-5680A_annotated.jpg> http://www.rhodiatoce.com/pics/time-nuts/FE-5680A_annotated.jpg _ Elio Corbolante. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
