MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 2261

• Manufacturer Part Number: MCIMX286CVM4B
• Description: IC MPU I.MX286 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX286CVM4B

• Core Processor: ARM9
• Core Size: 32-Bit
• Speed: 454MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, MMC, SmartCard, SPI, SSI, UART/USART, USB OTG
• Peripherals: DMA, I²S, LCD, POR, PWM, WDT
• Program Memory Size: 128KB (32K x 32)
• Program Memory Type: Mask ROM
• Ram Size: 32K x 32
• Voltage - Supply (vcc/vdd): 1.25 V ~ 5.25 V
• Data Converters: A/D 17x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 289-LFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -
• Eeprom Size: -
• Lead Free Status / Rohs Status: Compliant

Chapter 38
Low-Resolution ADC (LRADC) and Touch-Screen
Interface
38.1 LRADC Overview
This chapter describes the low-resolution analog-to-digital converters (LRADC) and
touch-screen interface. It includes sections on scheduling conversions, delay channels and
programmable registers.
The sixteen-channel low-resolution analog-to-digital converter block is used for voltage
measurement.
can be used at one time. Each of the eight virtual channels can be mapped to any of the 16
physical channels using HW_LRADC_CTRL4. Six physical channels are available for
general use.
Freescale Semiconductor, Inc.
0
7
8, 9
10
11
Channel
Number
6
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.
LRADC 2 - 6 can be used for 4/5-wire touch-screen control. LRADC 6 can be used for the wiper of 5-
wire touch-screen controller and external temperature sensing, but they cannot be enabled at the
same time in hardware configuration. LRADC 5 can be used for Y- of 4-wire and LR of 5-wire; LRADC
wire; LRADC 2 can be used for X+ and UR of 5-wire; 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 can not be enabled at same
Dedicated to measuring the voltage on the BATT pin and can be used to sense the amount of battery life remaining.
Dedicated to measuring the internal die temperature. HW_LRADC_CTRL2_TEMPSENSE_PWD must be cleared
for these inputs to function. See
Dedicated to measuring the voltage on the VDDIO rail. Also used to calibrate the voltage levels measured on the
auxiliary channels when those inputs are resistor-divided from the VDDIO rail.
Reserved input for analog testing.
4 can be used for X- of 4-wire and UR of 5-wire; LRADC 3 can be used for Y+ of 4-wire and LL of 5-
time in hardware configuration. LRADC 1 can be used for button as well as LRADC 0. There are the
hardware button press detect circuit for LRADC 0 and 1.
Figure 38-1
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
shows a block diagram of the LRADC. Eight virtual channels
Table 38-1. Channel Assignments
Internal Die Temperature
Assignment
Sensing.
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