MB3891 データシートの表示（PDF） - Fujitsu
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MB3891 Datasheet PDF : 29 Pages
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MB3891
s 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 µP (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 (µP side).
34
CLK-IN
I Non level shifted clock (µP side).
35
µP-IO
I/O Non level shifted bi-directional data input/output (µP 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)
3
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