Fujitsu MB3891 manual PIN Description, Pin No Symbol Descriptions

MB3891

■PIN DESCRIPTION

Pin No.	Symbol	I/O	Descriptions
1, 2	N.C.		Non connection.
3, 4	OUT3	O	LDO3 output pin.
5	GND3		LDO3 ground pin.
6, 7	OUT2	O	LDO2 output pin.
8, 9, 10, 11	VBAT1		Battery voltage input pin for LDO1 and LDO2.
12, 13	OUT1	O	LDO1 output pin.
14	CONT1	I	Power on input from keypad (Active low, Pulled up to VBAT2).
15	CONT6	I	“CONT6” input from digital system ∝P (Active high).
16	CONT2	I	External accessory supply voltage Enable (Active high).
17	XPOWERGOOD	O	Generates the main reset. (Active low, when OUT1 is out of regulation).
18	DELAYCAP		Timing capacitor for XPOWERGOOD delay.
19	GND1		LDO1, LDO2, V-BACKUP, Reference and System ground pin.
20	VBAT2		Battery voltage input pin for both UVLO’s, Reference and V-BACKUP
			LDO.
21	V-BACKUP	O	Supply voltage for Charger for rechargeable Lithium coin cell.
22	VREF	O	Supply voltage for Reference.
23	VFIL	O	Reference voltage Filter.
24	REF-OUT	O	Reference output voltage (Present when BACKUP UVLO is high).
25	VCC-VSIM		Input voltage for charge pump. (Supplied by VBAT1).
26	VSIM-ON	I	VSIM supply Enable (Active high).
27	SIMPROG	I	VSIM programming: Low = 3 V SIM, High = 5 V SIM.
28	OSC		Oscillator output pin.
29	VSIMOUT	O	Supply voltage for 3 or 5 V SIM-Card (SmartCard).
30	VCAP+		Positive side of boost capacitor.
31	VCAP−		Negative side of boost capacitor.
32	GND-VSIM		3 or 5 V SIM-Card (SmartCard) ground pin.
33	RESET-IN	I	Non level shifted SIM reset (∝P side).
34	CLK-IN	I	Non level shifted clock (∝P side).
35	∝P-IO	I/O	Non level shifted bi-directional data input/output (∝P side).
36	RST	O	Level shifted SIM reset (SmartCard side).
37	CLK	O	Level shifted SIM clock (SmartCard side).
38	SIM-IO	I/O	Level shifted bi-directional SIM data input/output (SmartCard side).
39	GND4		LDO4 ground pin.
40, 41	OUT4	O	LDO4 output pin.

(Continued)

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