Bosch 509, 5xx-7xx cell phones pinout

connector or cable wiring scheme

16 pin Bosch 509 cell phone special connector layout

16 pin Bosch 509 cell phone special connector
at the mobile phone (keypad up)

Pin	Name	Signal Description	Direction
8	VIN	Input voltage - supply pin	IN
16	C-BUS	Bi-directional serial control bus	IN/OUT
7	I-BUS	Data input (internal 100k pullup)	IN
15	PA_BIAS_ON	Trigger signal synchronous withr TX burst
6	V-BATT	Connected directly to the MS battery
14	HF_ENABLE	HF enable output
5	IGNITION	Sensing ignition (in car kit)
13	D-BUS	Data output	OUT
4	CHG-ID	Charger ID - detects type of charger
12	GND	Ground-this pin is checked by HF
3	A-UL	Analog input to phone
11	AGND	Analog ground
2	A-DL	Analog output from phone
10	AGND	Analog ground
1	EQUIP-ID	Pulled low by HF, internal pullup 100k
9	GND	Ground

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