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First edition (September 2004) Sony Ericsson Mobile Communications. publishes this manual without making any warranty as to the content contained herein. Further Sony Ericsson Mobile Communications. reserves the right to make modifications, additions and deletions to this manual due to typographical errors, inaccurate information, or improvements to programs and/or equipment at any time and without notice.
EMBEDDED APPLICATIONS FCT 1 Introduction When combined with the embedded applications scripting language, interfacing a keypad and LCD to the radio device can provide a simple man-machine interface without the need for external host controllers. This application note details the use the I2C interface for the LCD screen and the intrinsic functions to control a 5 x 4 keypad matrix.
EMBEDDED APPLICATIONS FCT 2 FCT design Here an application of a fixed-cellular-terminal (FCT) is used to illustrate the interfacing of a keypad and I C LCD to the radio device. Application Block Diagram (Fixed cellular terminal) Keypad Operation 2.1.1 When the script executes it calls a key-scan routine in an endless loop.
EMBEDDED APPLICATIONS FCT Note! The GND ground connection may be used as a column driver. When used, this is referred to as Column 0. Keypad Interface Schematic Keypad Configuration 2.1.3 The key pad is configured using intrinsic functions within embedded applications, further information can be found in the IDE help section.
EMBEDDED APPLICATIONS FCT C LCD Operation 2.2.1 The I C device used is a general purpose IO controller which is connected to a parallel port controlled LCD module. When the script executes, it writes I C data to set the GPIO chip outputs.
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EMBEDDED APPLICATIONS FCT Low) (Refer to Fig-2.5) R/W and RS Setup tsu1 Time R/W and RS Hold Time Data Setup Time tsu2 Data Hold Time E Cycle Time E Rise / Fall Time tr,tf Read Mode E Pulse Width (High, (Refer to Low) Fig-2.6)
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