SIM225 Technical Reference Manual
12
© Serious Integrated, Inc.
SIM225_TRM_A1ENUS
Revision A1
100%
off
off
141
1,3
tbd
1,2
mA
100%
on
on
tbd
1,3
tbd
1,2
mA
Notes:
1
Any additional external current draw from the module is in addition to this value
2
At minimum voltage on supply
3
At typical input supply voltage
4
Insufficient power for these features active; SIM will not function correctly
SUBSYSTEM DC POWER CHARACTERISTICS
The amount of power necessary for SIM225 to function is highly dependent on how you use the various
features of the SIM225, especially the major power consumers. If your application does not enable these
features, the typical and maximum power numbers can be appropriately subtracted from the maximums
for the SIM respectively. Assuming typical switching conversion efficiency, the power breakdown of the
elements is as follows:
+5V_MAIN Powered
Subsystem
Local Power
Required (mW)
+5V_MAIN to
Local
Conversion
Efficiency (typ)
+5V_MAIN Power
Required (mW)
Min
Typ
Max
Min
Typ
Max
LCD Backlight
800
850
85%
941
1000
USB Host
375
750
90%
417
833
Audio
700
1000
100%
700
1000
+3V3 Elements
(MCU, SDRAM, SFLASH, RTCC,
Temp Sensor, LCD, etc.)
630
1200
92%
685
1304
Battery Charging (+5V_USBF)
2500
100%
2500
Battery Charging (+5V_EXT)
4750
100%
4750
MCU I/O
Many I/O signals on the SIM225 are directly and exclusively connected to RX MCU pins. Consult the
RX63N/RX631
data sheet for complete specifications of each pin.
There are specific power limitations on the RX MCU pins. Consult the
RX63N/RX631
data sheet
for more information.
Exceeding these limits may damage your board, damage attached
systems, overheat or cause things to catch fire.
AC TIMING CHARACTERISTICS
The AC timing characteristics at the module level are governed by the underlying AC timing characteristics
of the individual components. Consult the component data sheets for more information.
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