参数资料
型号: MCIMX258CVM4
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA400
封装: 17 X 17 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-400
文件页数: 15/154页
文件大小: 1498K
代理商: MCIMX258CVM4
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 8
Freescale Semiconductor
111
”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).
3.7.18
Touchscreen ADC Electrical Specifications and Timing
This section describes the electrical specifications, operation modes, and timing of the touchscreen ADC.
3.7.18.1
ADC Electrical Specifications
Table 85 shows the electrical specifications for the touchscreen ADC.
Table 85. Touchscreen ADC Electrical Specifications
Parameter
Conditions
Min.
Typ.
Max.
Unit
ADC
Input sampling
capacitance (CS)
No pin/pad capacitance included
2
pF
Resolution
12
bits
Analog Bias
Resistance value
between ref and agndref
——
1.6
k
Ω
Timing Characteristics
Sampling rate (fs)
125
kHz
Internal ADC/TSC clock
frequency
——
1.75
MHz
Multiplexed inputs
8
Data latency
12.5
clk
cycles
Power-up time1
—14
clk
cycles
clk falling edge to
sampling delay (tsd)
—2
5
8
ns
soc input setup time
before clk rising edge
(tsocst)
—0.5
1
3
ns
soc input hold time after
clk rising edge (tsochld)
—2
3
6
ns
eoc delay after clk rise
edge (teoc)
With a 250fF load
2
7
10
ns
Valid data out delay after
eoc rise edge (tdata)
With a 250fF load
5
8
13
ns
相关PDF资料
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