Bluetooth; Antenna Interface; Sim Card Interface - SimCom SIM808 Hardware Design

4.9

Bluetooth

SIM808 supports Bluetooth function, customer only needs to design the Bluetooth antenna, and then customer can
operate Bluetooth conveniently by AT commands. For the detail commands about Bluetooth please refer to
document [1]
Fully compliant with Bluetooth specification3.0 + EDR
Support operation with GPS and GSM/GPRS worldwide radio systems
Fully integrated PA provides 10dbm output power
Up to 4 simultaneous active ACL links
Support sniff mode
Support PCM interface and built-in programmable transcoders for liner voice with transmission.
4.9.1 Bluetooth Antenna Interface
The module provides a Bluetooth antenna interface named ANT_BT. External antenna must be matched properly
to achieve best performance, so the matching circuit is necessary, the connection is recommended as the following
figure:
R201, C201, C202 are the matching circuit, the values depend on antenna debug result. Normally R201 is 0Ω,
C201 and C202 are not mounted.

4.10 SIM Card Interface

The SIM interface complies with the GSM Phase 1 specification and the new GSM Phase 2+ specification for
FAST 64 kbps SIM card. Both 1.8V and 3.0V SIM card are supported. The SIM interface is powered from an
internal regulator in the module.
SIM808_Hardware Design_V1.00
Figure 35: Bluetooth antenna matching circuit
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Smart Machine Smart Decision
2014.03.27