Using the AT85DVK-07 Board
2-10
AT85DVK-07 Development Board User Guide
4391B–MP3–07/07
Figure 2-7.
Microcontroller Unit Implementation
2.3.1
Socket
F o r d e ve l op m en t p ur p os e , a Z I F s o ck e t m ay b e s o ld e r ed i n pl a ce of t h e
AT85C51SND3Bx chip.
2.3.2
Reset
By pressing the RST push-button, a warm RESET of the AT85C51SND3Bx is
performed.
2.3.3
In System
Programming
Pressing the ISP push-button while releasing the RST bush button enters the in system
programming boot loader.
Note:
The AT85C51SND3Bx embeds a generic Nand Flash boot-loader.
2.4
Remote Control
Unit
The Remote Control unit is split in two different units: the Serial Remote Control Unit
and the Parallel Remote Control Unit.
2.4.1
Serial Remote Unit
The Serial Remote Control unit implements a 6-pin connector J23 sharing the UART
and high-speed SPI Interfaces. This connector allows easy connection with a host able
to control the audio player remotely.
Note:
The AT85DVK-07 Board is supplied without any RS-232 driver/receiver.
Figure 2-8.
Serial Remote Control Unit Implementation
Table 2-8.
Remote Control Connector (J23)
2.4.2
Parallel Remote Unit
The Parallel Remote Control unit implements a 26-pin connector J11 sharing the PSI (8-
bit Parallel Slave Interface) UART and high-speed SPI Interfaces. This connector allows
easy connection with a host able to control the audio player remotely.
Note:
The Parallel Slave Interface and Display Interface are sharing same signals. So on board
LCD must then be disconnected by removing its flat cable from J34 socket.
ISP
RST
Pin Number
Pin Name
Pin Description
1
VDD
IOVDD power supply 1.8V or 3V depending on the power configuration
2
P3.0/RXD/MISO
UART Receive Serial Data
SPI Master Input Slave Output Data Line
3
P3.1/TXD/MOSI
UART Transmit Serial Data
SPI Master Output Slave Input Data Line
4
P3.2/INT0/RTS/SCK
UART Request To Send Control Line
SPI Clock Line
5
P3.3/INT1/CTS/SS
UART Clear To Send Control Line
SPI Slave Select Line
6
VSS
0V digital supply reference
J23
1
