Figure 6: Internal pulldown characteristics AC characteristics AC electrical specifications define th" />
參數(shù)資料
型號: NS7520B-1-I46
廠商: Digi International
文件頁數(shù): 22/68頁
文件大?。?/td> 0K
描述: IC ARM MICROPROCESSOR 177BGA
標(biāo)準(zhǔn)包裝: 160
系列: NET+ARM®
應(yīng)用: 網(wǎng)絡(luò)處理器
核心處理器: ARM7
程序存儲器類型: 外部程序存儲器
RAM 容量: 外部
接口: EBI/EMI,以太網(wǎng),DMA,SPI,UART
輸入/輸出數(shù): 16
電源電壓: 1.4 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 177-LFBGA
包裝: 托盤
供應(yīng)商設(shè)備封裝: 177-BGA(13x13)
AC c h aracteristics
ww w.d i gi .c om
25
Figure 6: Internal pulldown characteristics
AC characteristics
AC electrical specifications define the timing relationship between signals for interfaces and modes
within a given interface.
AC electrical specifications
The AC electrical specifications are based on the system configuration shown in Figure 7, with a
5pF allowance for PCB capacitance and a 0.25 ns allowance for PCB delay. The timing of the
buffers, SDRAM, and the like must be added to complete timing analysis. In systems where SDRAM is
not used, two devices are expected to replace the SDRAMs shown in Figure 7; that is, they are tied
directly to the chip. System loading information is shown in Table 7: "System loading details" on
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