User's Manual

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Pin N°
Name
Function
Type
Voltage
1
GND
Keep feet on the ground.
Power
0V
2
VDD_IO
Direct path supply for 1.8V I/O pads.
Power
1.8V
3
GND
Keep feet on the ground.
Power
0V
4
SLOW_CLK
32.768KHz +/- 250ppm
I
1.8V
5
GND
Keep feet on the ground.
Power
0V
6
HCI_RX
HS UART Receive up to 4Mbps
I /PU
1.8V
7
TX_DBG
TI internal debug messages. Not used.
O /PU
1.8V
8
HCI_CTS
HS UART flow control: data from BTDB to
Host allowed when low
I /PU
1.8V
9
GND
Keep feet on the ground.
Power
0V
10
GND
Keep feet on the ground.
Power
0V
11
HCI_RTS
HS UART flow control: data from host to
BTDB allowed when low
O /PU*
1.8V
12
HCI_TX
HS UART Transmit up to 4Mbps
O/PU*
1.8V
13
GND
Keep feet on the ground.
Power
0V
14
PCM_SYNC
Frame synchro for audio data
I/O /PD
1.8V
15
PCM_CLK
Clock for audio data
I/O /PD
1.8V
16
PCM_OUT
Output of audio data. Maybe in tristate
O /PD
1.8V
17
PCM_IN
Input of audio data
I
1.8V
18-23
GND
Keep feet on the ground.
Power
0V
24
ENABLE
Disables BT chip when low (Pull down)
and performs internal reset of CC2564.
Minimum low state duration: 5ms
I /PD
1.8V
25
GND
Keep feet on the ground.
Power
0V
26
VDD_IN
General supply
I
2.2V-4.8V
27
GND
Keep feet on the ground.
Power
0V
PU* : Pull-Up enabled only during ShutDown and DeepSleep phases (.
These correspond to the metal cut-holes. See chapter 7.4.3.
The VDD_IN pin can accept 2.2V to 4.8V. Typical value is 2.5V or 3.3V, but this depends on the
motherboard.
Check the CC2564 datasheet for more information.
The UART has by default the following characteristics (can be reprogrammed to up to 4Mbps)