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7.9.1
7.10
J17 - External Crystal Circuitry Enable Jumpers CLOCK_EN
Enables or disables the external crystal circuitry. Both positions must
be installed to enable use of crystal circuitry.
Figure 7-18: External Crystal Circuitry Enable Jumper CLOCK_EN (J17)
Optional Jumpers For Various VDD And VSS
The DEMO9S08QB8 provides 5 jumpers, J22 through J25, for different VDD
and VSS connections on the bottom of the board. By default, they are not
populated and are shorted correspondingly with zero-ohm resistors in parallel,
except J24 which is populated. A user may take off the zero-ohm resistor and
install a corresponding jumper.
Note:
JR2 (Jumper 23) and JR5 (Jumper 26) have no effect on QB8 devices.
8
8.1
DEMO9S08QB8 CODE DEVELOPMENT SOFTWARE
The DEMO9S08QB8 includes P&E’s Embedded Multilink circuitry, so no
external hardware BDM tool is needed to debug and program the
DEMO9S08QB8. A user only needs to connect the DEMO9S08QB8 to their
PC to start developing code for it.
The DEMO9S08QB8 package comes with a special edition of Freescale’s
CodeWarrior studio. In addition, P&E’s evaluation software for HCS08 is
available online at www.pemicro.com. A user may use either CodeWarrior or
P&E software tools to develop code for the DEMO9S08QB8.
Using CodeWarrior With The DEMO9S08QB8
The CodeWarrior studio supports Freescale’s HCS08 devices. It offers C,
C++, and assembly-level support, and provides debugging capabilities based
on P&E’s debug and programming technologies.
A programming or debug session with the project-based CodeWarrior IDE
may be launched by double-clicking on the project name (the format is
projectname.mcp) from your file storage. Its tutorials, FAQs, and quick start
guides are easy to follow and will allow you use pre-built templates to begin
creating a new project in a short time.
DEMO9S08QB8 User Manual
33
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