Fujitsu MB3891 Manual De Usuario

3

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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 

µ

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 (

µ

P side).

34

CLK-IN

I

Non level shifted clock (

µ

P side).

35

µ

P-IO

I/O

Non level shifted bi-directional data input/output (

µ

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.