Mini PCIe is a scaled down version of PCIe which uses 1 lane for connecting to an external card. This interface mainly used in notebooks, tablets, laptops is used for connecting Wi-Fi, Bluetooth, Cellular broadband, Ethernet cards to the processor.
The following figures show the Mini PCIe connectors and cards available in the market:
The following figures show the Mini PCIe connectors and cards available in the market:
The following are the signals in mini PCIe connector:
- PCIe x1
- Reference Clock
- USB2.0
- SMBus
- LED's for diagnosis and signalling
- SIM card connectivity
- 1.5V/3.3V power (1 pin for 3.3 V Aux, 2 pins for +3.3 V main, 3 pins for +1.5 V main, 12 GND pins)
- Some slots for future PCIe lane expansion
What may not be possible with Mini PCIe slot?
- Graphics cards
- Video cards
This is because with the existing lanes in Mini PCIe band-width will not be enough for handling graphics content.
Mini PCIe Connector specifications:
- 52-pin edge connector used
- Staggered with 2 rows
- 0.8mm pitch
- Dimensions: 30 x 50.95 mm
Other important considerations in Mini PCIe:
- Mini PCIe uses a differential clock of 100 MHz
- Wake mechanism (in band) which helps module to be in stand-by mode during idle states
- With the 52-pin staggered edge connector used, angled insertion and removal of add-in cards is done
- Some add-in card connectivity can be screwed for mechanical support
- Maximum power supported is 2.3 W
- With +3.3 V power lane, peak current supported is 1 A
- With +1.5 V power lane, peak current supported is 1.5 V
- +3.3 V is mainly used for I/O requirements, +1.5 V is only to avoid any on-board regulation
- LED's used in Mini PCIe must be 9 mA sink capable
- If you have Mini PCIe card and on board PCIe connectivity is only available, then, adapters are available for use in the market
Targeted applications for Mini PCIe:
- Wireless Personal Area network (BT, UWB cards)
- Local Area network cards (10/100/1G/10G cards)
- Wireless Local Area network (802.11a/b/g cards)
- Wireless Area Network (xDSL, Cable modem)
- Wireless Wide Area Network (GSM/GPRS/UMTS/CDMA cards)
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