BLE2U
4
5. Package size and pins of BLE2U-C
Pin No.
Pin Name
Pin Type
Description
1
GND
P
Ground
2
PANT
A
Optional pin to connect antenna externally (Note 2)
3
SWREG_EN
I
Internal DC-DC power enable, with built-in pull-up resistor
Enabled when at low level
4
BLE_MODE
I
Bluetooth mode selection, with built-in pull-up resistor
Low level: Slave mode. High level: Master-slave mode.
5
RTS#
O
UART MODEM output signal, request to send, active low
6
DCD#
I
UART MODEM input signal, data carrier detection
7
RI#
I
UART MODEM input signal, ring indicator
8
CTS#
I
UART MODEM input signal, clear to send, active low
9
NC
N
Suspended pin. Do not connect to it.
10
NC
N
Suspended pin. Do not connect to it.
11
GND
P
Ground
12
VCC
P
Power input
13
LED
O
Chip status and data receive/transmit indication output pin, active
low
14
DSR#
I
UART MODEM input signal, data device ready
