UM0401 datasheet(7/17 Pages) STMICROELECTRONICS

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UM0401

Getting started

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JP55_2 and JP56_2: as shown in Figure 5 below, these jumper settings are to select

the I2C CLOCK and DATA source, either from the parallel port (DB-25 connector) or

from an external I2C Master.

Figure 5.

JP55_2 and JP56_2 for I2C_CLK and I2C_SDATA selection

These jumpers should be connected if STMPE801 is to be controlled by the GUI through the

DB-25 connector. They can be left open if an external I2C Master is used. For using external

I2C Master, refer to Section 3.

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JP2_3: as shown in Figure 6 below, JP2_3 is used to connect the INT pin to the pull-up

resistor and LED for easier monitoring of the generated interrupts. If this is not

connected, an external pull-up resistor should be used to pull up the open drain INT

output to VIO supply. The jumper should connect pins 1 and 2.

Figure 6.

JP2_3 setting for STMPE801 INT pull-up

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JP3_3 and JP5_3: JP3_3 is used to connect the I2C_CLK from the I2C Master to the

STMPE801 SCLK pin. And similarly JP5_3 is used to connect I2C_DATA from the I2C

Master to the STMPE801 SDATA pin. Figure 7 shows the jumper connection to be used

on the board.

Figure 7.

JP3_3 and JP5_3 setting for STMPE801 SCLK and SDAT

UM0401 Datasheet(PDF) 7 Page - STMicroelectronics