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Chapter 3 Hardware

CoreModule 435 Reference Manual 33

Note: The shaded table cells denote power or ground.

Miscellaneous

Real Time Clock (RTC)

The CoreModule 435 contains a Real Time (time of day) Clock (RTC), which can be backed up with an

external Lithium Battery. The CoreModule 435 will function without a battery in those environments which

prohibit batteries. The CoreModule 435 will also continue to operate after the battery life has been

exceeded. Under these conditions all setup information is restored from the on-board flash memory during

POST along with the default date and time information.

User GPIO Interface

The CoreModule 435 provides GPIO pins for customer use, and the signals are routed to header J8. An

example of how to use the GPIO pins resides in the Miscellaneous Source Code Examples on the

CoreModule 435 Support Software QuickDrive.

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 CoreModule 435 to demonstrate the use of GPIO pins. For

more information about the GPIO pin operation, refer to the Programming Manual for the Vortex processor

at:

http://www.vortex86sx.com/?page_id=3.pdf

Table 3-16 describes the pin signals of the GPIO interface, which uses a 10-pin header with 2 rows, odd/

even sequence (1, 2), and 0.079" (2mm) pitch.

Note: The shaded table cells denote ground.

7 CLK_PCI PCI Clock

8 AD1 Command, Address, and Data 1

9 FRAME Frame Signals - indicate start of new cycle or termination of broken cycle

10 AD0 Command, Address, and Data 0

NOTE Some operating systems require a valid default date and time to function.

Table 3-16. User GPIO Interface Pin Signals (J8)

Pin # Signal Description

1 GPIO0 User defined

2 GPIO1 User defined

3 GPIO2 User defined

4 GPIO3 User defined

5 GPIO4 User defined

6 GPIO5 User defined

7 GPIO6 User defined

8 GPIO7 User defined

GND Ground

10 GND Ground

Table 3-15. LPC Interface Pin Signals (J20) (Continued)

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 57 58

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