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COMMON SPECIFICATIONS
Radio Chip:
CSR BC417
Memory:
External 8Mbit Flash
Output Power: -4 to +6dbm Class 2
Sensitivity:
-80dbm Typical
Bit Rate:
EDR, up to 3Mbps
Interface:
UART
Antenna:
Built-in
Dimension:
27W x 13H mm
Voltage:
3.1 to 4.2VDC
Current:
40mA max
COMMON HARDWARE INTERFACING CON-
SIDERATIONS
The EGBT-04 module will work with supply voltage
of 3.1VDC to 4.2VDC. When supplied with 3.3VDC,
it will interface directly with the UART port of any
microcontroller chip running at 3.3VDC.
When used with 5V microcontrollers, The TXD
output logic swing of the EGBT-04 still falls within
the valid 5V TTL range, hence, can be connected
directly to the UART RXD of the 5V microcontroller
host. EGBT RXD and inputs, however, are not 5V
tolerant, and can be damaged by 5V level logic go-
ing in. Some level translation circuit must be added
to protect the inputs.
A simple diode level translator circuit like the ones
shown in Figure 3 and 7 will suffice in most applica-
tions. A better alternative is with the use of 5V input
tolerant tiny logic chips such as 74LVC1G125 – a
single buffer chip housed in smd sot23-5 package.
Page 2 of 15 pages
EGBT-046S PIN CONFIGURATION
Table 1. EGBT-046S Pin Description
PIN
1
2
11
12
13
22
24
Note:
All unassigned pins must be left unconnected.
EGBT-046S/EGBT-045MS Bluetooth Module
EGBT-046S
Figure 1. EGBT-046S Pin Layout
ID
DESCRIPTION
TXD
UART TXD Output
RXD
UART RXD Input
RESET
RESET Input
Vcc
+3.1 to 4.2VDC Power Input
GND
Common Ground
GND
Common Ground
LED
LED Status Indicator
Flashing
- Waiting to Connect/Pair
Steady ON
- Connected/Paired
e-Gizmo Mechatronix Central
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