AT89DVK-04 Atmel, AT89DVK-04 Datasheet - Page 8

• Manufacturer Part Number: AT89DVK-04
• Description: BOARD DEMO MP3 PLAYER
• Manufacturer: Atmel

Specifications of AT89DVK-04

• Processor To Be Evaluated: AT89C51SND1
• Interface Type: USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: SND1-DEMOBOARD

2.1.10
2.1.11
2.1.12
AT89C51SND1C Development Board User Guide
Voice Area
Two Wire Interface
(TWI) Area
UART Area
n Mass storage for song downloading or uploading.
The board is delivered with a USB cable.
The voice area consists of an electret type microphone along with a preamplifier to
adapt the level to the AT89C51SND1 ADC input. Gain is adjustable using RV5. A mono
jack connector allows connection of an external electret type microphone. Figure 2-4
shows the external microphone connector pinout while Table 2 gives its pin assignment.
Figure 2-4. J14 Male Connector
Table 2. J14 Pinout
The TWI area consists of a 4-pin extension connector implemented to support and
power TWI devices. Figure 2-5 shows the external microphone connector pinout while
Table 3 gives its pin assignment.
Figure 2-5. J12 TWI Extension Connector
Table 3. J12 Pinout
The UART area consists of a 4-pin extension connector implemented to support and
power RS232 or other interface drivers. Figure 2-6 shows the UART extension connec-
tor pinout while Table 4 gives its pin assignment.
Figure 2-6. J11 UART Extension Connector
Table 4. J11 Pinout
Pin Number
Pin Number
Pin Number
1
2
1
2
3
4
1
2
Pin Assignment
Microphone input signal. This input is polarized through a 2.2 k Ω resistor.
AVREFN (Analog 0V reference signal)
Pin Assignment
VDD (Digital 3V)
VSS (Digital 0V)
SCL
SDA
Pin Assignment
VDD (3V)
VSS (0V)
4
4
2
3
3
2
2
1
1
1
AT89C51SND1 Development Board
4206A–MP3–11/02
2-4