MCIMX255AJM4AR2 Freescale Semiconductor, MCIMX255AJM4AR2 Datasheet - Page 111

• Manufacturer Part Number: MCIMX255AJM4AR2
• Description: Processors - Application Specialized IMX25 1.2 AUTO
• Manufacturer: Freescale Semiconductor

Specifications of MCIMX255AJM4AR2

• Core: ARM926EJ-S
• Processor Series: MCIMX25
• Maximum Clock Frequency: 400 MHz
• Instruction / Data Cache Memory: 16 KB
• Data Ram Size: 128 KB
• Operating Supply Voltage: 1.15 V to 1.52 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: MAPBGA-400
• Interface Type: USB
• Memory Type: DDR2
• Minimum Operating Temperature: - 40 C

1
2
3
4
3.7.18.2
Figure 82
of the internal ADC. After a conversion cycle eoc is asserted, a new conversion begins only when the
Freescale Semiconductor
Power-down current
NVCC_ADC
QV
Expected plate resistance
Switch drivers on resistance
DNL
INL
Gain + Offset Error
This comprises only the required initial dummy conversion cycle. Additional power-up time depends on the enadc , reset and
soc signals applied to the touchscreen controller.
This value only includes the ADC and the driver switches, but it does not take into account the current consumption in the
touchscreen plate. For example, if the plate resistance is 100 W, the total current consumption is about 33 mA.
At avdd = 3.3 V, dvdd = 1.2 V, Tjunction = 50 °C, fclk = 1.75 MHz, any process corner, unless otherwise noted.
Value measured with a –0.5 dBFS sinusoidal input signal and computed with the code density test.
DD
4
4
represents the synchronization between the signals clk, soc, eoc, and the output bits in the usage
Parameter
ADC Timing Diagrams
Table 85. Touchscreen ADC Electrical Specifications (continued)
i.MX25 Applications Processor for Automotive Products, Rev. 9
GND and VDD switches
fin = 1 kHz
fin = 1 kHz
Conversion Characteristics
Touchscreen Interface
Conditions
—
—
—
3
Min.
100
—
—
—
—
—
+/–0.75
+/–2.0
Typ.
—
—
—
—
Max.
1500
+/–2
10
10
—
—
1
%FS
Unit
LSB
LSB
uA
uA
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