DSB45 Development Support Box
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DSB45_HD_V05
Page 26 of 50
01.02.2008
3.1.2
Internal supply voltages
The internal supply voltage values generated by the PCB and the permitted tolerance levels
are specified below:
Table 13: Default values and tolerance levels of supply voltages
Voltage
Function
Min.
Typical
Max.
Unit
Voltages adjustable on DSB45 (see Chapter 3.1.3 and Table 14)
Nominal supply voltage (nomV) of GSM
module
4.05 4.1 4.15
V
Minimum supply voltage (minV) of GSM
module
3.45 3.5 3.55
V
V
adjust
(BATT+)
Maximum supply voltage (maxV) of GSM
module
4.45 4.5 4.55
V
Voltages not adjustable on DSB45 (not accessible via interfaces)
VL
Switched logic high level voltage (on if GSM
module is on)
3.17 3.25
3.3 V
3V3
Supply voltage of DSB45 circuits
AC45 only: Supply voltage of digital units
3.17 3.25
3.3 V
+5V
Audio interface supply voltage
4.75
5.0
5.25
V