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Chapter 3
User GPIO Signals (J8)
The ReadyBoard 800 provides eight GPIO pins for custom use and the signals are routed to the J8
connector. There is an example of how to use the GPIO pins in the Miscellaneous Source Code
Examples subdirectory, under the ReadyBoard 800 Software menu on the ReadyBoard 800 Doc & SW
CD-ROM, (RB800\software\examples\GPIO)
The example program can be built by using the make.bat file. This produces a 16-bit DOS executable
application, gpio.exe, which can be run on the ReadyBoard 800 to demonstrate the use of GPIO pins.
For more information about the GPIO pin operation, refer to the Programming Manual for the Super I/O
(W83627HF) controller at:
http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/627hf.pdf
Table 3-21. User GPIO Signals Pin/Signal Descriptions (J8)
Pin #
Signal
1
GND
2
+5V
3
GPIO0
4
GPIO1
5
GPIO2
6
GPIO3
7
GPIO4
8
GPIO5
9
GPIO6
10
GPIO7
Notes: The shaded area denotes power or ground.
Temperature Monitoring
The Super I/O controller (W83627HF) performs the temperature monitoring function and has inputs
directly from two thermistors on the board. One thermistor is located near the CPU and the other
thermistor is located near the I/O Hub (Southbridge).
NOTE
The ReadyBoard 800 requires a heatsink for all
processors, but no fan.
Serial Console
The ReadyBoard 800 supports the serial console (or console redirection) feature. This I/O function is
provided by an ANSI-compatible serial terminal, or the equivalent terminal emulation software running
on another system. This can be very useful when setting up the BIOS on a production line for systems
that are not connected to a keyboard and display.
52
Serial 1 (J15A) Lower Port
Standard DB9 Serial Port Connector
(Female)
Rear View
Figure 3-2. Oops! Jumper Connection
Description
Ground
+5 VDC
User defined
User defined
User defined
User defined
User defined
User defined
User defined
User defined
Reference Manual
1
2
3
4
(COM1)
6
7
8
Hardware
5
9
ReadyBoard 800
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