參數(shù)資料
型號(hào): MCIMX258CVM4
廠商: Freescale Semiconductor
文件頁數(shù): 14/153頁
文件大?。?/td> 0K
描述: IC MPU I.MX25 IND 400MAPBGA
標(biāo)準(zhǔn)包裝: 90
系列: i.MX25
核心處理器: ARM9
芯體尺寸: 32-位
速度: 400MHz
連通性: 1 線,CAN,EBI/EMI,以太網(wǎng),I²C,MMC,智能卡,SPI,SSI,UART/USART,USB OTG
外圍設(shè)備: DMA,I²S,LCD,POR,PWM,WDT
輸入/輸出數(shù): 128
程序存儲(chǔ)器類型: 外部程序存儲(chǔ)器
RAM 容量: 144K x 8
電壓 - 電源 (Vcc/Vdd): 1.15 V ~ 1.52 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 3x12b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 400-LFBGA
包裝: 托盤
i.MX25 Applications Processor for Consumer and Industrial Products, Rev. 10
110
Freescale Semiconductor
”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 250 pF load
2
7
10
ns
Valid data out delay after eoc rise
edge (tdata)
With a 250 pF load
5
8
13
ns
Power Supply Requirements
Current consumption2 NVCC_ADC
QVDD
——
2.1
0.5
mA
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