Using the AT89RFD-08 Board
AT89RFD-08 Hardware User Guide
2-13
4382E–MP3–05/06
2.5
On-board
Resources
2.5.1
LEDs
Two leds are provided on the AT89RFD-08 Reference Design. They are connected to
P2_5 and P2_6 and are all free of usage. No dedicated signaling from the
AT89C51SND2C is predefined on these leds.
Figure 2-13.
Leds position on the board
2.5.2
2-key Keypad
The AT89RFD-08 board embeds a two-key keypad.
Figure 2-14.
Keypad location
SELECT
push button is connected to KIN0 line of the microcontroller while
OK
push but-
ton is connected to INT0.
2.5.3
Secure Digital (SD) /
MultiMedia Card
(MMC) Area
The MultiMedia Card area consists of a single slot connector that allows the plug-in of
MMC cards and SD cards.