Freescale Semiconductor TWR-LCD User guide
TWR-LCD
User’s Manual
Rev. 1.3
Freescale Semiconductor Inc.
Contents
1 Overview ...................................................................................................................................................... 3
2 Reference Documents .............................................................................................................................. 4
3 Hardware Features ................................................................................................................................... 4
3.1 Power Supply ....................................................................................................................................................................... 4
3.2 LCD Display / Controller ................................................................................................................................................. 5
3.2.1 Communication Mode ...................................................................................................................................................................... 5
3.2.2 MCU Selection ...................................................................................................................................................................................... 5
3.2.3 Resistive Touch Overlay .................................................................................................................................................................. 6
3.3 MicroSD Card ........................................................................................................................................................................ 7
3.4 5-way Navigation Switch ................................................................................................................................................. 8
3.5 Mini-B USB Connection .................................................................................................................................................... 8
3.6 Bootloader ............................................................................................................................................................................. 9
3.6.1 Obtaining the S19 file ........................................................................................................................................................................ 9
3.6.2 Using the Bootloader ........................................................................................................................................................................ 9
3.7 Elevator Connections ..................................................................................................................................................... 10
4 Jumper Table ........................................................................................................................................... 12
4.1 Mechanical Form Factor ............................................................................................................................................... 13
TWR-LCD User’s Manual Page 2 of 13
LCD Display
Tower Primary Side Expansion Ports
(Sides A and B)
External Connectors
Interface Component Power
5.0V
microSD
Card
Socket
Freescale Device
mini-B USB
Recepticle
5.0V
SPI1, IRQ, GPIO
SPI1, KBI, GPIO
USB (DP/DN)
External Bus
Interface (EBI)
SPI0
SPI2
LCD Display Controller
Resistive
Touch Panel
Analog
Analog
I
2
C
5-Way Navigation
Switch
Power Regulation
3.3V15.5V
Core
Voltage
Backlight
Driver
Piezo
PWM PWM
MCF51JM
ColdFire® V1
Microcontroller
1 Overview
The Tower LCD Module (TWR-LCD) adds a side mounting TFT QVGA Display to the Freescale Tower
System. It can be used with a wide variety of Tower Processor Modules through a SPI and/or external
bus interface (EBI).
The TWR-LCD features a 3.2” QVGA TFT LCD Display with touch sensitive overlay, 5-way navigation
control, MicroSD Card slot, dedicated MCF51JM microcontroller, and a Piezo Buzzer for audible
feedback. The LCD Display Controller is accessible to the dedicated MCF51JM microcontroller through
the SPI. The LCD Display Controller is also accessible to any capable Tower MCU module utilizing
either the SPI or the EBI. A block diagram for the TWR-LCD is shown in the figure below.
TWR-LCD User’s Manual Page 3 of 13
Figure 1 - TWR-LCD Block Diagram
Figure 2 - Tower System with TWR-LCD
2 Reference Documents
The documents listed below should be referenced for more information on the Freescale Tower
system and the TWR-LCD. Refer to http://www.freescale.com/tower for the latest revision of all
Tower documentation.
TWR-LCD Schematics
TWR-LCD Quick Start Guide
Truly TFT2N0451-E LCD Module Specification
3 Hardware Features
This section provides more details about the features and functionality of the TWR-LCD.
3.1 Power Supply
The TWR-LCD can be powered as a standalone device from the Mini-B USB connector. The TWR-LCD
can also be powered from a source in an assembled Tower System via the 5.0V supply on the TWRELEV Side Expansion Port. When attached to a Tower Elevator board, it is required that the board be
externally powered from the Elevator board; additionally the USB connector on the TWR-LCD can still
be used to communicate over USB to the on-board MCF51JM MCU. On-board power regulation will
provide the necessary core voltage (3.3V) and backlight driver voltage (15.5V).
TWR-LCD User’s Manual Page 4 of 13
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