Specifications

E271-2200 and E271-2210 Controllers 109

40 Invert x axis

80 Invert y axis

C0 Default

BYTE2

Bit Hex Description

0-5 00-3F Data format code

6 & 7 00 Reserved

40 300 baud

80 9600 baud

C0 1200 baud (default)

To compute the values for BYTE1 and BYTE2, add the hex values of the bits you

desire. For example,

Invert Y + No rev. level + no status + enabled

BYTE1= 80 + + 1 = 81

9600 baud + Mode

BYTE2= 80 + 27 = A7

Enabling/Disabling Controller Readings

If bit 0 of BYTE1 is cleared, the controller will not perform conversions, and

therefore not transmit any touch coordinates, effectively disabling the controller.

The controller remains alert to host programming sequences (such as a re-enabling

sequence).

The controller is enabled by default at power-on.

Reporting Controller Status

If bit 1 of BYTE1 is set, the controller will respond by sending its current values

for BYTE1 and BYTE2, in the following three byte sequence:

For normal operation, this bit should be clear. BYTE2 is ignored when this bit is

set.

Reporting Firmware Revision Level

If bit 2 of BYTE1 is set, the controller will respond by sending its emulated

firmware revision level as an ASCII string of at most 20 characters. For example: