MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 2297

• Manufacturer Part Number: MCIMX281AVM4B
• Description: IC MPU I.MX28 1.2 289MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: i.MX28r

Specifications of MCIMX281AVM4B

• 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: Supplier Unconfirmed

}
channelAverage = HW_LRADC_CHn(7).VALUE / 5;
Address:
Freescale Semiconductor, Inc.
Reset
Reset
NUM_SAMPLES
ACCUMULATE
TESTMODE_
// Wait for interrupt.
Bit
Bit
W
W
TOGGLE
TOGGLE
RSRVD1
R
R
VALUE
28 24
23 18
Field
17 0
31
30
29
31
15
0
0
HW_LRADC_CH7
30
14
0
0
This bit toggles at every completed conversion so software can detect a missed or duplicated sample.
This read-only bit toggles at every completed conversion of interest in test mode so software can synchornize
to the desired sample. When the test mode count is loaded with a value of 7, this will toggle every eighth
conversion on channel 7. If testmode operation for channel 5 and or 6 are set then the sample rate will be
lower for channel 7.
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.
29
13
0
0
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
28
12
0
0
8005_0000h base + C0h offset = 8005_00C0h
HW_LRADC_CH7 field descriptions
NUM_SAMPLES
27
11
0
0
26
10
0
0
Chapter 38 Low-Resolution ADC (LRADC) and Touch-Screen Interface
25
0
0
9
VALUE[15:0]
24
0
0
8
Description
23
0
0
7
22
0
0
6
21
RSRVD1
0
5
0
20
0
4
0
19
0
0
3
18
0
0
2
VALUE[17:16]
17
0
0
1
2297
16
0
0
0