ATSAM3S-EK Atmel, ATSAM3S-EK Datasheet - Page 17

• Manufacturer Part Number: ATSAM3S-EK
• Description: KIT EVAL FOR ATSAM3S4C
• Manufacturer: Atmel
• Series: SAM3Sr
• Type: MCUr

Specifications of ATSAM3S-EK

• Contents: Board, Cables, Power Supply
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex-M3
• Kit Contents: Board
• Features: TFT Colour LCD Display, SD/MMC Interface
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• For Use With/related Products: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.3.10
4.3.10.1 Microphone Input
SAM3S-EK Development Board User Guide
Audio Interface
Figure 4-11. JTAG Interface
The SAM3S–EK board supports both audio recording and playback.
The audio volume can be adjusted using the potentiometer RV1, and the microphone amplifier gain can
be adjusted via jumpers (fixed gain of 24 or 26 dB).
The embedded microphone is connected to an audio pre-amplifier using the TS922 operational amplifier
(MN11). The gain is set by using JP14 and JP15 jumpers; both must be set or removed at the same
time.
By modifying the jumper positions, you can select each of the following gain values:
20 dB (default setting, both JP14 and JP15 are off)
26 dB (both JP14 and JP15 are on).
Note:
3. The TB1 series 0 Ohm resistor is a reservation for future impedance adaptation facility.
4. The audio pre-amplifier MN11 is powered by a dedicated low dropout regulator
Under specific amplifier settings conditions, this enables the easy insertion of a capaci-
tor or any other bipolar device on the audio path. On the other hand, R83 is a default
0 Ohm resistor that enables the disconnection of PB0 from the audio input path for cus-
tom usage.
MIC5219-3.3 (MN14).
NRST
PB4
PB6
PB7
PB5
R39
R39
100K
100K
R40
R40
100K
100K
R41
R41
100K
100K
R44
R44
R42
R42
100K
100K
0R
0R
R43
R43
100K
100K
+3V3
11
13
15
17
19
1
3
5
7
9
J6
J6
VTref
nTRST
TDI
TMS
TCK
RTCK
TDO
nSRST
DBGRQ
DBGACK
Vsupply
GND1
GND2
GND3
GND4
GND5
GND6
GND7
GND8
GND9
2
4
6
8
10
12
14
16
18
20
DGND
Evaluation Kit Hardware
11031C–ATARM–30-Mar-11
4-9