Nc Pins; Power Supply And Consumption - Huawei EM770 Product Specification

Table 3-13 PERST# signal
Pins
22

3.2.8 NC Pins

The NC pins are not internally connected in the EM770.

3.3 Power Supply and Consumption

The EM770 is supplied by 3.3 V power source, which must satisfy all requirements of
PCI Express Mini CEM specifications, such as voltage tolerance and peak and
normal current. The detailed requirements are listed in Table 3-14.
Table 3-14 Power requirements
Power
3.3 V
Note:
The power consumptions of the EM770 in different scenarios are respectively listed
in Table 3-15.
Table 3-15 DC power consumption (HSPA/WCDMA/ GSM/GPRS/EDGE)
WCDMA/HSDPA data DC power consumption
Description
WCDMA
Huawei Confidential: This documents is Huawei Proprietary and Confidential(NDA
Issue 1
Required).It may not be duplicated, neither distributed externally without
(2008-09-15)
prior and written permission of Huawei.
Name Description
PERST# Force a hardware reset
on the card.
Voltage Tolerance
±9%
l In burst transmit mode of GSM/GPRS/EDGE, the peak current of the module will exceed 2
A, which will pull down the power voltage transitorily and perhaps result in the reset of the
module or host. In order to avoid this case, you can add a large bulk capacitor beside the
module on the host side.
To minimize the RF radiation through the PCI-E interface, you can add a 33 pF ceramic
l
capacitor to ground on every pin of the PCI-E on the host side except USB D+/D-.
Band
Band I(IMT2100)
Band II(PCS 1900)
Band V(850M)
HUAWEI EM770 HSPA PC Embedded Module V100R001
Additional
Description
H: normal or
standby.
L: Reset the
EM770.
Peak (Maximum)
2750 mA
Test Value
291.3
661.3
312.6
723.5
299.8
645.2
Product Specification
Direction to
Module
Input
Normal (Maximum)
1100 mA
Units Power(dBm)
mA 10dBm Tx Power
mA 24dBm Tx Power
mA 10dBm Tx Power
mA 24dBm Tx Power
mA 10dBm Tx Power
mA 24dBm Tx Power
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