DVK-BTM521 Laird Technologies, DVK-BTM521 Datasheet - Page 86

• Manufacturer Part Number: DVK-BTM521
• Description: BT MM DEV KIT
• Manufacturer: Laird Technologies
• Type: Transceiver, Bluetoothr

Specifications of DVK-BTM521

• Frequency: 2.4GHz
• Interface Type: RS-232
• Processor Series: BTM521
• Silicon Manufacturer: Laird Technologies
• Kit Application Type: Communication & Networking
• Application Sub Type: Bluetooth
• Kit Contents: Development Board & Software Tools
• Features: Supports CSR
• Rohs Compliant: Yes
• For Use With/related Products: BTM521
• 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-BTM521

BTM520/521
Bluetooth
AT COMMAND SET
REFERENCE
86 www.lairdtech.com
®
Multimedia Plus Module
Field
0 – PS
1 – DIR
2 – INV
3 – FME
4 – FMS
[5:7]
[8:15]
function mapping code /
av_operation_id
Bit
Default 0
15
Function mapping code / av_operation_id
14
0
13
0
Table 3.42: GPIO Configuration Register Field Descriptions
Description
I/O Pin State – returns the current state of the I/O pin (0/1) when read
A write affects the I/0 pin directly if DIR=1 and FME=0
Direction – controls if the I/O pin is an input or an output
0 input
1 output
Inversion – controls if the I/O pin is inverted or not. Applies to both pin directions
(read and write).
0 not inverted
1 inverted
Function Mapping Enable – Enables function mapping of the pin. A function map-
ping code or an av_operation_id must be set in GPIO configuration register [8:15].
The pin will carry out the assigned operation and is not accessible anymore as GPIO.
0 disable function mapping
1 enable function mapping
Function Mapping Select – Selects if a Function Mapping Code (see Table 3 44) or
an av_operation_id (see Table 3.20) is set in GPIO configuration register [8:15]. Valid
only if FME=1.
0 select Function Mapping Code (Table 3.44)
1 select av_operation_id (Table 3.20)
Reserved
A Function Mapping Code (FMC, Table 3.44) or an av_operation_id (Table 3.20) is
set in this bit field. The pin is mapped to a profile specific function (A2DP,HFP) or
to an AVRCP remote control operation and will carry out the assigned operation. A
mapped function does not affect any other flag of the GPIO configuration register.
So, e.g. DIR and INV must be set manually according to the selected function and
hardware requirements.
Valid only if FME=1.
FMS selects function mapping code or av_operation_id.
See also section 8.1 on pg.84 “Profile specific GPIO function mapping”
12
0
And section 5.5 on pg. 55 “AVRCP GPIO Mapping”
11
0
Figure 3.27: GPIO configuration register
10
0
9
0
8
0
7
Reserved
0
6
0
5
0
4
FMS FME INV
0
3
0
2
0
Laird Technologies
1
DIR
0
0
PS
0