DSB75 Development Support Board Rev. B1 Hardware Description
Confidential / Released
DSB75_hd_v12
Page 75 of 96
2008-08-26
5.2
Overview of Jumpers
Table 33: Overview of jumpers
Function
Reference
Jumper set
Jumper not set
X120
1)
Voltage that is delivered by an USB
host connected to X110 can be used as
source for the module’s USB interface,
switch S110 must be in position 3
Voltage that is delivered by an USB host is
disconnected to the module’s USB interface,
switch S110 must be in position 1 to deliver
that voltage from the 5-volt supply on the
DSB75
X121
1)
Voltage that is delivered by an USB
host connected to X111 can be used as
source for the module’s USB interface
Voltage that is delivered by an USB host
connected to X111 cannot be used as source
for the module’s USB interface
X122
Connects BATT+ voltage to GSM
module
Disconnects BATT+ voltage from GSM
module
Jumper pins can be used for BATT+ current
measurements
3)
X203
1)
Enables DTR at COM1 interface
Disables DTR at COM1 interface
3)
X204
Enables receiver outputs of COM1
Disables receiver outputs of COM1
X206
Enables receiver outputs of COM2
Disables receiver outputs of COM2
X405
1)
Disables BATT+ generation
Enables BATT+ generation
X410
1)
X411
1)
Both jumpers set: maximal BATT+ voltage is generated (4.5 Volt)
Jumper on X410 set: nominal BATT+ voltage is generated (4.1 Volt)
Jumper on X411 set: minimal BATT+ voltage is generated (3.5 Volt)
X420
1)
Ignition on
Ignition off
X421
1)
EMERG_RST on
EMERG_RST off
X500
1)
Enables SIM card detection
Disables SIM card detection
X560
2)
Connects signal DAC_OUT to filter
circuit
Disconnects signal DAC_OUT from filter circuit
X561
2)
Enables the loop back of the filtered
signal DAC_OUT_F to the ADCx_IN
signals
Filtered signal DAC_OUT_F terminates on this
jumper pin 1 (access point)
X562
2)
Ground
pins
X600
Resistor R602 (150m
Ω
) shorted
Resistor R602 (150m
Ω
) not shorted
X710
1)
Jumper set to pin 1 and 2: charger
circuit is supplied by external charger
interface voltage
Jumper set to pin 2 and 3: charger
circuit is supplied by internal voltage
5V0
Charger circuit is not supplied
1)
Jumper is intended for controlling the described function from a remote device.
2)
Jumper is intended for replacing DAC-OUT- filter by customer.
3)
Cut the trace of the jumper at the first use (see also Figure 45).