 15 pin Motorola cellphone special connector at the mobile phone ? | | Pin | Signal | Description |
| 1 | GND | Connected with 22pf to pin 3 |
| 2 | RF out | Connected with 33 pf to pin 8, 33 pf to pin, 33 pf to pin 7 |
| 3 | GND | |
| 4 | BAT_FDBAK | |
| 5 | MAN_TEST | connected with 10k to L275 (not used on digital phones) |
| 6 | RS232_TX | connected to MCU SPI bus |
| 7 | RS232_RX | connected to MCU SPI bus |
| 8 | AUDIO_IN | |
| 9 | AUDIO_OUT | |
| 10 | GNDA | Ground reference) Connected with 33 pf to pin 13, 33 pf to pin 14 |
| 11 | UPLINK | 11,12,13 - DSC bus connected to the BIC |
| 12 | DOWNLINK | |
| 13 | DSC_EN_B | |
| 14 | EXT_B+ | |
| 15 | Gnd | |
Source:www.pinouts.ru
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