BTM420/421
Bluetooth
®
Data Module
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/bluetooth
8
Laird
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
Pin
Signal
Description
Voltage Specification
41
GNd
42
GPIO1 / UART_RI
I/O for hose
VIO
43
Unused
44
Unused
45
GND
46
D-
USB D-
VUSB
47
D+
USB D+
VUSB
48
Unused
49
Unused
50
Unused
1.
Unused pins may have internal connections and must not be connected.
2.
Reset input is active low. Input is pulled up to VDD_IN via 22k. Minimum reset pulse width is 5 ms.
3.
Pins 25-37 should be left not connected on modules with integrated antennae (BTM411, BTM421 and
BTM431)
Operating Parameters
Table 4: Recommended Operating Conditions
Recommended Operating Conditions
OPERATING CONDITION
MIN
MAX
VDD_USB (USB compatibility not required)
1.7
3.6
VDD_USB (USB compatibility required)
3.1
3.6
VDD_IO
1.7
3.3
VDD_IN
3.0
3.3
