MCIMX27ADSE Freescale Semiconductor, MCIMX27ADSE Datasheet - Page 29

• Manufacturer Part Number: MCIMX27ADSE
• Description: KIT APPLICATION DEV ADS I.MX27
• Manufacturer: Freescale Semiconductor
• Series: i.MXr
• Type: Microcontrollerr

Specifications of MCIMX27ADSE

• Contents: Main Board, LCD Panel, Keypad, NAND Flash Card, Image Sensor and TV Encoder Card
• Silicon Manufacturer: Freescale
• Core Architecture: ARM
• Core Sub-architecture: ARM9
• Silicon Core Number: I.MX2
• Silicon Family Name: I.MX27
• Supported Devices: I.MX27
• Rohs Compliant: Yes
• For Use With/related Products: i.MX27
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

To use the TFT LCD display, connect the 34 conductor ribbon cable supplied with the ADS from J11 of
the LCD module to P14 of the ADS as shown in Figure 2-13.
The potentiometer VR1 on the LCD board controls flickering of the display screen. If the TFT LCD
display flickers, you may adjust VR1 to stabilize the display. Use a suitable flat head or phillips head
screwdriver. Because the adjustment is normally done with power applied, we recommend use of a plastic
blade tool.
2.4.3
The ADS includes an external keypad module. The interface reads via the KCOL[5:0] and KROW[5:0]
signals. The interface has chording diodes to prevent ghost key presses. The keys labeled with numeric,
cursor control, soft key, and spare key functions. The default keypad can be replaced by a custom design.
The UART2 signals that are multiplexed internally with the KCOL[7,6] and KROW[7,6] signals are
brought out to keypad connector P22. This allows the use of an 8x8 keypad matrix. Table 2-13 shows the
key switch connections to the keypad signals by function name and the switch reference designators.
Freescale Semiconductor
Using a Keypad
R464 R463
i.MX27ADS
J20
S7
JP63
JP69
BZ1
R460
J18
R425
JP65
P14
P15
P22
S1
Figure 2-13. Installing the LCD board
J91
MCIMX27ADSE User’s Manual, Rev. A
F1
JP73
J4
CN5
34 CONDUCTOR
RIBBON CABLE
J11
VR1
TFT LCD PANEL
(240 x 320 dots)
LCD BOARD
Configuration and Operation
2-15