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XPT7603 Datasheet(PDF) 22 Page - List of Unclassifed Manufacturers

Part No. XPT7603
Description  4-wire resistive touch screen controller
Download  25 Pages
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Maker  ETC2 [List of Unclassifed Manufacturers]
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 22 page
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Figure 9 PENIRQ Function Schematic
In the measurement of X, Y and Z coordinates of the process, PENIRQ low output; in the
measurement of VBAT, AUX and temp process, PENIRQ high output.
PD0 = 1, the pen interrupt function have been banned, can not touch the touch screen to monitor
movement. If you want to re-enable interrupt function pen, with the need to control PD0 = 0 to
write the word XPT7603, if written in the last control word contains PD0 = 0, pen interrupt output
will be written after the completion of the command enable.
In order to avoid false triggering, it is proposed, in the control word processor to XPT7603, the
PENIRQ masked interrupts.
11 Application Notes
Follow the following rules then the XPT7603 can be brought into full play the advantages. There are many
contradictions about power, cost, size and weight in the most design of portable system. Generally , the vast
majority of chips for portable systems need to have considerable clean power and ground, this is because
most of its internal very low power consumption devices. This will mean that fewer and fewer total bypass and
ground. Moreover, the circumstances vary, so should pay attention to the following recommendations and
requirements.




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