MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 2270
MCIMX281AVM4B
Manufacturer Part Number
MCIMX281AVM4B
Description
IC MPU I.MX28 1.2 289MAPBGA
Manufacturer
Freescale Semiconductor
Series
i.MX28r
Datasheets
1.MCIMX283DVM4B.pdf
(2327 pages)
2.MCIMX283DVM4B.pdf
(20 pages)
3.MCIMX281AVM4B.pdf
(72 pages)
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
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Behavior During Reset
2270
TOUCH_DETECT_ENABLE
YNLRSW
YPLLSW<1:0>
XNURSW<1:0>
XPULSW
SW0 Status
SW1 Status
SW2 Status
SW3 Status
SW4 Status
SW5 Status
SW6 Status
SW7 Status
Figure 38-3. Using Delay Channels to Oversample a Touch-Screen
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
1
0
00
00
0
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
Delay Channel 1 oversample intervals:
1. Times out.
2. Kicks LRADC4 (X+ sample).
3. Repeats 3 more times.
Delay Channel 0 (touch-screen settling time):
1. Times out.
2. Kicks Delay Channel 1.
Touch-screen ISR:
1. Sets Y+,Y- drive and clears LRADC4 ACC.
2. Set Delay Channel 1 for LRADC4.
3. Kicks Delay Channel 0.
4. Return from interrupt.
0
0
00
10
1
OFF
ON
OFF
OFF
OFF
ON
OFF
OFF
Final Conversion sets IRQ.
0
1
01
00
0
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
1
0
00
00
0
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
Freescale Semiconductor, Inc.
0
1
01
10
1
OFF
ON
ON
OFF
OFF
ON
ON
OFF
0
1
10
01
1
OFF
ON
OFF
ON
ON
OFF
ON
OFF
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