Data Sheet

Bluegiga Technologies Oy
Page 36 of 52
 Support for full 24-bit system mode (8080/6080/VSYNC/WSYNC).
 ITU-R/BT.656 compliant D1 digital video output mode with on-the-fly RGB to YCbCr color-space-
conversion.
 Support for a wide variety of input and output formats that allows for conversion between input and
output (for example, RGB565 input to RGB888 output).
For more information refer to the i.MX28 Applications Processor Reference Manual, chapter 33.
6.10 LRADC0-6 (Touch interface)
Function
Resolution
12 bits
Maximum sampling rate
428kHz
DC input voltage
0-1.85V
Expected plate resistance
2000-50000 ohm
Table 46: LRADC
LRADC 0 - 6 measure the voltage on the seven application-dependent LRADC pins. The auxiliary channels
can be used for a variety of uses, including a resistor-divider-based wired remote control, external
temperature sensing, touch-screen, button and so on.
Pin#
4-wire touch
5-wire touch
Other
Net name
185
X-
UR
Generic ADC 4
LRADC4
186
X+
UL
Generic ADC 2
LRADC2
187
Y-
LR
Generic ADC 5
LRADC5
188
Y+
LL
Generic ADC 3
LRADC3
189
WIPER
Generic ADC 6
LRADC6
190
Generic ADC 0
LRADC0
191
Generic ADC 1
LRADC1
Table 47: LRADC
For pull-up or pull-down switch control on LRADC2~5 pins, please refer to HW_LRADC_CTRL0 register.
LRADC 0 can be used for button and external temperature sensing, they cannot be enabled at same time in
hardware configuration. LRADC 1 can be used for button as well as LRADC 0. For an example of how LRADC
can be used for connecting multiple buttons, please see Freescale’s reference design for the i.MX28
processor.
For more information refer to the i.MX28 Applications Processor Reference Manual.