MCIMX253DJM4 Freescale, MCIMX253DJM4 Datasheet - Page 111

• Manufacturer Part Number: MCIMX253DJM4
• Manufacturer: Freescale

Specifications of MCIMX253DJM4

• Operating Temperature (min): -20C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

3.7.18
This section describes the electrical specifications, operation modes, and timing of the touchscreen ADC.
3.7.18.1
Table 85
Freescale Semiconductor
Input sampling
capacitance ( C
Resolution
Resistance value
between ref and agndref
Sampling rate (fs)
Internal ADC/TSC clock
frequency
Multiplexed inputs
Data latency
Power-up time
clk falling edge to
sampling delay (tsd)
soc input setup time
before clk rising edge
(tsocst)
soc input hold time after
clk rising edge (tsochld)
eoc delay after clk rise
edge (teoc)
Valid data out delay after
eoc rise edge (tdata)
• ”Tx” and “Rx” refer, respectively, to the transmit and receive sections of the SSI.
• For internal frame sync operation using external clock, the FS timing is the same as that of Tx data (for example, during AC97
mode of operation).
Parameter
shows the electrical specifications for the touchscreen ADC.
Touchscreen ADC Electrical Specifications and Timing
1
S
ADC Electrical Specifications
)
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 7
No pin/pad capacitance included
With a 250fF load
With a 250fF load
Table 85. Touchscreen ADC Electrical Specifications
Conditions
Timing Characteristics
—
—
—
—
—
—
—
—
—
—
Analog Bias
ADC
Min.
0.5
—
—
—
—
2
2
2
5
12.5
Typ.
1.6
12
14
—
—
8
2
5
1
3
7
8
Max.
1.75
125
—
10
13
—
8
3
6
cycles
cycles
MHz
Unit
kHz
bits
k Ω
clk
pF
clk
—
ns
ns
ns
ns
ns
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