參數(shù)資料
型號: MCIMX258CJM4A
廠商: Freescale Semiconductor
文件頁數(shù): 21/153頁
文件大小: 0K
描述: IC MPU IMX25 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(wǎng),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(shù): 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(shù)據(jù)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
117
3.7.20
USBOTG Timing
This section describes timing for the USB OTG port and host ports. Both serial and parallel interfaces are
described.
3.7.20.1
USB Serial Interface Timing
The USB serial transceiver is configurable to four modes supporting four different serial interfaces:
DAT_SE0 bidirectional, 3-wire mode
DAT_SE0 unidirectional, 6-wire mode
VP_VM bidirectional, 4-wire mode
VP_VM unidirectional, 6-wire mode
The following subsections describe the timings for these four modes.
3.7.20.1.1
DAT_SE0 Bidirectional Mode Timing
Table 90 defines the DAT_SE0 bidirectional mode signals.
Figure 89 shows the USB transmit waveform in DAT_SE0 bidirectional mode diagram.
Figure 89. USB Transmit Waveform in DAT_SE0 Bidirectional Mode
2 F
baud_rate: Baud rate frequency. The maximum baud rate the UART can support is (ipg_perclk frequency)/16.
Table 90. Signal Definitions—DAT_SE0 Bidirectional Mode
Name
Direction
Signal Description
USB_TXOE_B
Out
Transmit enable, active low
USB_DAT_VP
Out
In
Tx data when USB_TXOE_B is low
Differential Rx data when USB_TXOE_B is high
USB_SE0_VM
Out
In
SE0 drive when USB_TXOE_B is low
SE0 Rx indicator when USB_TXOE_B is high
USB_DAT_VP
USB_SE0_VM
US1
US2
Transmit
US4
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