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DSB75 Development Support Board Rev. B1 Hardware Description

Strictly confidential / Released

DSB75_hd_v08 Page 9 of 94 29.09.2005

Preceding document: ”DSB75 Development Support Board Hardware Description", v02

New document: "DSB75 Development Support Board Rev. B1 Hardware Description" v03

Chapter What is new

2.2 Modified figure: “System overview”

2.3 Modified figure: “Placement of connectors, switches, jumpers, LEDs and adjustable

resistors”

2.4 Modified figure: “Block diagram”

3.3 Modified figure: “GPIO circuit”

3.5.1 Corrected value of level converter D200 (COM1). Added information: “Therefore the

PWR_IND signal is used for enabling and shut down converters.”

3.5.2, 3.5.3 Corrected value of level converter D201 (COM2, COM3). Added information:

Therefore the PWR_IND signal is used for enabling and shut down converters.

3.6 Modified figure: “Analog audio interface – overview”; modified figure: “Location of the

audio connectors and switches”

3.6.2.2 New speakerphone added.

3.8 Added information about second USB interface X111. Modified figure: “USB device

interface”.

3.9 Added information about functionality of LEDs V503, V504. Modified figure: ”I²C

interface”.

3.10 Modified figure: ”SD card interface”

3.12 Modified figure: ”Analog interface”

3.14 Modified figure: ”Power supply interface”

3.14.1 Modified information in Table 23, row “Power supply of digital part of DSB75”. Added

new row in Table 23: “Digital IO supply (VDD)””

3.14.2 Corrected information about power indication.

3.14.3 Changed information about battery operation. Added recommendations for batteries.

3.14.3.1 Added Siemens ordering number and technical data for plug-in charger. Added new

table: “Pin assignment of the X701 jack for the plug-in charger”.

3.14.3.2 Corrected: I

max

=150mV / 0.3Ohm = 500mA @ Jumper X600 open;

max

=150mV / 0.15Ohm =1A @ Jumper X600 closed

Modified figure: “Schematic of charging circuit”.

3.14.4 New chapter: “Real Time Clock Supply”

4.2 Modified information about indication of GPIO signals. Modified figure: “GPIO signal

indication circuit”.

4.3 Corrected information about indication of power.

4.4 New chapter: “Indication of I²C Lines”

5.1 Completely updated table: “Overview of switch positions”.

5.2 Table 31: added jumpers X122, X203, X204, X206, X420, X421 X562, X600 and

footnotes 2, 3. Added figure: “Location of jumpers”.

6 Added mounting description and figure: “Mounting GSM module onto the DSB75”.

6.1.1 Deleted constraints: “Start-up by DTR0 toggling is only effective if the USB host is not

active. Start-up by plugging the USB cable is only effective if the RS-232 lines are

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