MCIMX286CVM4B Freescale Semiconductor, MCIMX286CVM4B Datasheet - Page 2286

• 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

Programmable Registers
38.5.7 LRADC 1 Result Register (HW_LRADC_CH1)
The LRADC result register returns the 12-bit result for low resolution analog to digital
converter channel one.
HW_LRADC_CH1: 0x060
HW_LRADC_CH1_SET: 0x064
HW_LRADC_CH1_CLR: 0x068
HW_LRADC_CH1_TOG: 0x06C
The Result register contains the most recent conversion results for one channel of the
LRADC. Note that each channel can be converted at an independent rate. The TOGGLE
bit is used to debug missed conversion cycles. When using oversampling, the channel must
be individualy scheduled for conversion N times for when N samples are required before
an interrupt is generated. This is most easily accomplished by using one of the LRADC
Delay Channels.
EXAMPLE
if (HW_LRADC_CHn(1).TOGGLE == 1) { } // Toggle is high.
// ...
unsigned long channelAverage;
HW_LRADC_CHn_WR(1, (BF_LRADC_CHn_ACCUMULATE(1)
2286
NUM_SAMPLES
ACCUMULATE
TOGGLE
RSRVD2
RSRVD1
VALUE
28 24
23 18
Field
17 0
31
30
29
This bit toggles at every completed conversion so software can detect a missed or duplicated sample.
Reserved
Set this bit to one to add successive samples to the 18 bit accumulator.
This bit field contains the number of conversion cycles to sum together before reporting operation complete
interrupt status. Set this field to zero for a single conversion per interrupt.
Reserved
This bit field contains the most recent 12-bit conversion value for this channel. If automatic oversampling is
enbled this bit field contains the sum of the most recent N oversampled values, where N is set in the
NUM_SAMPLES field for this channel. When 32 full-scale samples are added together, the 12-bit results
can sum up to 256K. Software is responsible for dividing this value by the number of samples summed
together. Software must clear this register in preparation for a multi-cycle accumulation.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
BF_LRADC_CHn_NUM_SAMPLES(5)
HW_LRADC_CH0 field descriptions
Description
| // Enable accumulation mode.
| // Set samples to five.
Freescale Semiconductor, Inc.