Redpine Signals, Inc.
Page 11
R
R
S
S
-
-
W
W
C
C
-
-
3
3
0
0
1
1
E
E
v
v
a
a
l
l
u
u
a
a
t
t
i
i
o
o
n
n
B
B
o
o
a
a
r
r
d
d
U
U
s
s
e
e
r
r
G
G
u
u
i
i
d
d
e
e
V
V
e
e
r
r
s
s
i
i
o
o
n
n
2
2
.
.
5
5
1
1
be left open
9
GND
-
Ground
10
VCC
Power
3.3V power supply. If the USB
port for power supply is not used,
this pin can be used to drive
power to the EVB from the Host
MCU platform. The direction of the
“Power Selection” switch is
ignored in this case. The
maximum current sourcing
capacity of the Host should be
500mA. If not used, this pin
should be left open
11
NC
-
No connect
12
NC
-
No connect
13
BT_PRIORITY
Input
Used to indicate through logic
high that BT is transmitting high
priority traffic. When BT
coexistence is not used, this pin
should be grounded
14
NC
-
No connect
15
WLAN_ACTIVE Output
Used for BT Coexistence. It
indicates with logic high that
WLAN activity is in progress.
When low, BT device has the
opportunity to transmit. Not used
in current firmware, should be left
open
16
NC
-
No connect
17
NC
-
No connect
18
NC
-
No connect
19
NC
-
No connect
20
GND
-
Ground
Table 4: General Purpose Header(RS-WC-301-EVB)
SPI Header
The SPI header is used to connect the SPI interface of the module to a Host
MCU.
Pin
Number
Pin Name
Direction
Description
1
NC
-
No connect
2
SPI_CS
Input
SPI slave select. Active low.
3
GND
-
Ground
4
NC
-
This pin must be left unconnected
5
SPI_CLK
Input
SPI clock. Max frequency of 12.5
