Siemens ET7 Series Specifikace stáhnout pdf (Strana 59)

DSB75 Development Support Board Rev. B1 Hardware Description

Strictly confidential / Released

DSB75_hd_v08 Page 59 of 94 29.09.2005

AUDIO

GND

100R

R750

R751

100R

GNDGND

5V0_I

C752

100µF

C753

100µF

GND

C751

100N

C750

100N

5V0

Figure 35: Schematic for audio supply (5V0_I)

3V3_4V5

GND

R415

2K7

R410

GND

10K

R409

X410

VIN

VOUT

N410

LP3856-ADJ

ADJ

GND

X411

C411

R411

R414

9410µF

C412,414,415

5V0

X405

GND

Figure 36: Schematic for GSM module supply (3V3_4V5 or BATT+)

1 2 ... 54 55 56 57 58 59 60 61 62 63 64 ... 93 94

Hardware Description 1
Contents 3
Figures 4
0 Document History 7
1 Introduction 11
1.3 Scope of Delivery 12
1.4 Terms and Abbreviations 12
2 General Overview 14
2.2 System Overview 16
Adjustable Resistors 17
2.4 Block Diagram 18
2.5 Interface Overview 19
3.2 Test Points 23
3.3 GPIO Lines 25
Figure 9: SIM card interface 27
Figure 11: RS-232 interfaces 29
Table 9: Pin assignment of 1 31
3.6.2.1 Recommended Headset 36
Figure 18: DAI interface 39
3.9 I²C Interface 43
Figure 23: I²C interface 44
3.10 SD Card Interface 46
11 10 8 7 6 5 4 3 2 1 9 47
3.10.1 SD 4 Bit Mode 48
3.10.2 SD 1 Bit Mode 49
3.10.3 SPI Bus Mode 50
3.12 Analog Interface 53
3.13 Antenna Interface 55
C400,401,405 58
X602 pin. Function 61
3.14.3.2 Charging Circuit 62
GSM module 63
3.14.5 Adjusting the V 64
4 Status LEDs 65
4.3 Indication of Power 67
4.4 Indication of I²C Lines 67
5.1 Overview of Switches 68
5.2 Overview of Jumpers 73
Figure 48: Turn on circuit 77
6.1.3 Emergency Restart 78
7 Technical Data of DSB75 79
~~~~~~~~~~~~~~~ 82
8 Appendix 83
APPR'D 84
NB = not mounted 87
NB_ = not mounted 88
8.3 Floor Plan of the DSB75 93

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