Clone Connector Design Rules
Care must be taken when designing an onboard cloning connector. The following are a few requirements needed for a successful cloning connector design.
| QT320/QT310 | Place the connector as close as possible to the chip. Placing the cloning connector far |
| from the part will increase sensor load capacitance Cx and decrease sensitivity, as |
| some of the cloning lines are also sense lines. Long distances on cloning lines can |
| also make the clone process more susceptible to communication errors from ringing |
| and interference, and create an RF antenna for external fields. |
| QT310 | If the Synchronization input is used, a 10K resistor should be used to avoid problems |
| with the cloning process; see Figure 4 below. |
Vdd Vdd
10K | 10K |
DRDY
SCK
REQ
SDO
10K | 10K |
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/CAL |
| /CAL | OUT |
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/SYNC_O |
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/SYNC_I |
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lq | 9 | QTM300CA/R1.02 25.09.03 |