參數資料
型號: MCIMX258CVM4
廠商: Freescale Semiconductor
文件頁數: 90/153頁
文件大?。?/td> 0K
描述: IC MPU I.MX25 IND 400MAPBGA
標準包裝: 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,I²C,MMC,智能卡,SPI,SSI,UART/USART,USB OTG
外圍設備: DMA,I²S,LCD,POR,PWM,WDT
輸入/輸出數: 128
程序存儲器類型: 外部程序存儲器
RAM 容量: 144K x 8
電壓 - 電源 (Vcc/Vdd): 1.15 V ~ 1.52 V
數據轉換器: 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
Freescale Semiconductor
41
3.7
Module Timing and Electrical Parameters
This section contains the timing and electrical parameters for i.MX25 modules.
3.7.1
1-Wire Timing Parameters
Figure 7 shows the reset and presence pulses (RPP) timing for 1-Wire.
Figure 7. 1-Wire RPP Timing Diagram
Table 32 lists the RPP timing parameters.
Figure 8 shows write 0 sequence timing, and Table 33 describes the timing parameters (OW5–OW6) that
are shown in the figure.
Figure 8. Write 0 Sequence Timing Diagram
Table 32. RPP Sequence Delay Comparisons Timing Parameters
ID
Parameters
Symbol
Min.
Typ.
Max.
Units
OW1
Reset Time Low
tRSTL
480
511
μs
OW2
Presence Detect High
tPDH
15
60
μs
OW3
Presence Detect Low
tPDL
60
240
μs
OW4
Reset Time High
tRSTH
480
512
μs
Table 33. WR0 Sequence Timing Parameters
ID
Parameter
Symbol
Min.
Typ.
Max.
Units
OW5
Write 0 Low Time
tWR0_low
60
100
120
μs
OW6
Transmission Time Slot
tSLOT
OW5
117
120
μs
1-Wire bus
1-Wire Memory Device
“Presence Pulse”
(OWIRE_LINE)
1-Wire Tx
“Reset Pulse”
OW1
OW2
OW3
OW4
OW5
OW6
1-Wire bus
(OWIRE_LINE)
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