DVK-BTM411 Laird Technologies, DVK-BTM411 Datasheet - Page 34

• Manufacturer Part Number: DVK-BTM411
• Description: BLUETOOTH EVAL BOARD BTM411
• Manufacturer: Laird Technologies
• Type: Transceiverr

Specifications of DVK-BTM411

• Frequency: 2.4GHz
• Wireless Frequency: 2.402 GHz to 2.48 GHz
• Interface Type: UART
• Data Rate: 2.1 Mbps
• Operating Voltage: 3 V to 3.3 V
• Antenna: Multilayer Ceramic Integrated
• Operating Temperature Range: - 30 C to + 70 C
• Output Power: 4 dBm
• Technology/ Type: Development Kit
• For Use With/related Products: BTM411
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: DVK-BTM411

BTM410/411
Bluetooth
AT COMMAND SET
REFERENCE
34 www.lairdtech.com
®
AT Data Module
Bit
Default
3. GPIO
On a BTM410/411 device a number of digital I/Os can be used for general purposes. Each GPIO will
be assigned to an S-Register (S651 to S663) which will be capable of both GPIO configuration (config
mode) as well as single pin read/write access (r/w mode). The bitmask of the I/O pin for direct read/write
access will be 0x01. All configuration flags are allocated to higher value bits. A bitmask for the I/O pin
will be applied to if S-Register 650 is set to 1. This will enable the user to access a GPIO-Pin directly
by reading/writing 0 or 1. If the GPIO shall be configured, S650 must be set to 0 in order to obtain
access to the GPIO configuration flags.
All logical GPIO lines can be read/written in one atomic step by new S-Register 670 at any time.
Some GPIOs can have an alternative function assigned. If the alternative function is enabled, the
appropriate I/O Pin is not available as GPIO any more. Handshaking functions are generally enabled
per default. Wi-Fi coexistence functions are currently not used. But if they should be used or required
in the future, the appropriate function cannot be moved to another I/O Pin. Hence it should be
considered that no other user function is assigned to an I/O Pin if the coexistence functions are required.
The following table lists all GPIOs and their alternative functions.
15
0
14
0
13
0
GPIO Pin
(BTM410/411)
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
GPIO6
GPIO7
GPIO8
12
0
GPIO - Alternative Functions BTM410/411
11
0
Figure 3.6: GPIO configuration register
10
0
Reserved
Handshaking
RI
DCD
-
-
-
-
DTR
DSR
9
0
Alternative Function
8
0
7
0
-
-
BT_Priority /
Ch_Clk
BT_Active / BT_
State
Wlan_Active
Rf_Active
-
-
Wi-Fi Coexistence
6
0
5
0
4
0
3
FME INV
0
Laird Technologies
2
0
1
DIR
0
0
PS
0