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DSB75 Development Support Board Rev. B1 Hardware Description
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DSB75_hd_v08 Page 68 of 94 29.09.2005
5 Overview of Switches and Jumpers
This section provides an overview of all switches and jumpers located on DSB75. The exact
location of each switch and jumper is shown in Figure 2 and Figure 43.
5.1 Overview of Switches
Table 30: Overview of switch positions
Function Reference
Switch position 1 Switch position 3
S110 Do not use this position! (reserved for
future use)
Source of VUSB_IN voltage is the DSB75
(5V)
Connects the VUSB_IN line directly to USB
connector X110 (VBUS)
S111
Do not use this position! (reserved for
future use)
Connects the USB_DN line to the USB-
OTG interface (D110, X111)
Connects the USB_DN line directly to USB
connector X110 (D-)
S112 Do not use this position! (reserved for
future use)
Connects the USB_DP line to the USB-
OTG interface (D110, X111)
Connects the USB_DP line directly to USB
connector X110 (D+)
S200 Using RXD0 line as ASC0-RXD
Connects B2B connector signal RXD0 to
the RS-232 transceiver D200 used for
asynchronous serial interface ASC0
Using USC2 line as ASC0-RXD
Connects B2B connector signal USC2 to
the RS-232 transceiver D200 instead of
RXD0
S201 Using TXD0 line as ASC0-TXD
Connects B2B connector signal TXD0 to
the RS-232 transceiver D200 used for
asynchronous serial interface ASC0
Using USC1 line as ASC0-TXD
Connects B2B connector signal USC1 to
the RS-232 transceiver D200 instead of
TXD0
S300 Using TXD1 line as SPI2 chip select
Connects B2B connector signal TXD1 to
the signal SPI2_CS at connector X510
pin 1
Using TXD1 line as ASC1-TXD or SD card
chip select (SPI mode)
Connects B2B connector signal TXD1 to
S301 pin 2
S301 Using TXD1 line as ASC1-TXD
Connects B2B connector signal TXD1 to
the RS-232 transceiver D201 used for
asynchronous serial interface ASC1 if
S300 is in position 3
Using TXD1 line as SD card chip select
(SPI mode)
Connects B2B connector signal TXD1 to
the card reader connector X301 pin 1 if
S300 is in position 3
S302 Using RXD1 line as SPI2 data in
Switch position 2: Connects B2B
connector signal RXD1 to the signal
SPI2_DI at connector X510 pin 3
Using RXD1 line as ASC1-RXD or SD card
data in (SPI mode)
Connects B2B connector signal RXD1 to
S303 pin 2
- 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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