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Table 7 lists the configuration options.
Table 7. Smart Star CPU Card Jumper Configurations
Header
Description
Pins Connected
Factory
Default
JP1
RS-485 Bias and Termination
Resistors
1–2
5–6
1–3
Bias and termination resistors
connected
Bias and termination resistors not
×
4–6
connected *
JP2
U5 Flash Memory Size
1–2
128K/256K
×
2–3
512K
JP3
SRAM Size
1–2
128K
×
2–3
512K
JP4
U11 Flash Memory Size
1–2
128K/256K
×
2–3
512K
JP5
Flash Memory Bank Select
1–2
Normal Mode
×
2–3
Bank Mode
* Although pins 1–3 and 4–6 of header JP1 are shown “jumpered” for the termination and
bias resistors not connected, pins 3 and 4 are not actually connected to anything, and this
configuration is a “parking” configuration for the jumpers so that they will be readily
available should you need to enable the termination and bias resistors in the future.
User ’s Manual
65
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