参数资料
| 型号： | AT89DVK-04 |
| 厂商： | Atmel |
| 文件页数： | 7/11页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO MP3 PLAYER |
| 标准包装： | 1 |
| 其它名称： | SND1-DEMOBOARD |
AT89C51SND1 Development Board
t
Table 1. J2 Pinout
Pin Number
1
2
Pin Assignment
PS (+5V supply voltage)
GND (0V supply reference)
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
2.1.7
2.1.8
2.1.9
2-3
AT89C51SND1 Area
Keypad Area
Display Area
DAC Area
In-System
Programming (ISP)
Area
DataFlash Area
MultiMedia Card
(MMC) Area
USB Area
The AT89C51SND1 area consists of the AT89C51SND1 product along with the follow-
ing items:
n Reset Circuit
n 16 MHz Oscillator
n PLL Filter
n Analog Reference Circuit
The keypad area consists of a 4 by 3 matrix with one key replaced by a “ Keypad Lock ”
switch.
The display area consists of a 2-line by 16 characters LCD display. The contrast is
adjustable using RV1 variable resistor.
The DAC area consists of a standard audio DAC embedding the headphone amplifier.
The headphone connector is standard and allows connection of all headphone types.
The ISP area contains a switch that allows the user to select the AT89C51SND1 hard-
ware condition and thus execute the embedded bootloader or to run the client
application. Note that on V2.1 board, the switch is located on the right side of the board
near J6 connector. Figure 2-3 shows the switch position to enter ISP mode.
Figure 2-3. ISP Switch Position
User ’ s Code Execution
ISP Execution
a. V2.1 Board Implementation
User ’ s Code Execution
ISP Execution
b. V2.2 Board Implementation
The DataFlash area consists of the on-board Flash memory. It is composed of four
AT45DB642 giving 32-Mb for the V2.2 board or four AT45DB321 giving 16-Mb for the
V2.1 board.
The MultiMedia Card area consists of a 2-slot connector that allows the plug-in of two
MMC cards simultaneously.
The USB area consists of a standard USB type B receptacle for the V2.2 board while
V2.1 is equipped with a mini but non-standard connector. USB is used for two different
tasks:
n Firmware upgrade for In-System Programming.
AT89C51SND1C Development Board User Guide
4206A – MP3 – 11/02
相关PDF资料 |
PDF描述 |
|---|---|
| AT89ISP | CABLE ISP PROGRAMMER 8051 |
| AT89RFD-01 | KIT REF DESIGN FOR AT89C51SND1 |
| AT89RFD-08 | REF DESIGN REMOTE MP3 PLAYER |
| AT89STK-05 | KIT STARTER FOR AT89C5131 |
| AT89STK-06 | KIT DEMOBOARD 8051 MCU W/CAN |
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