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NUC120RD2DN Datasheet(PDF) 67 Page - Nuvoton Technology Corporation |
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NUC120RD2DN Datasheet(HTML) 67 Page - Nuvoton Technology Corporation |
67 / 107 page NUC100/120xxxDN Mar. 21, 2019 Page 67 of 107 Rev 1.03 External Bus Interface (EBI) 6.5 6.5.1 Overview The NuMicro ® NUC100 series LQFP-64 and LQFP-100 package is equipped with an external bus interface (EBI) for accessing an external device. To save the connections between external device and this chip, EBI supports address bus and data bus multiplex mode. And, address latch enable (ALE) signal is used to differentiate the address and data cycle. 6.5.2 Features External Bus Interface has the following functions: Supports external devices with max. 64 KB size (8-bit data width)/128 KB (16-bit data width) Supports variable external bus base clock (MCLK) which based on HCLK Supports 8-bit or 16-bit data width Supports variable data access time (tACC), address latch enable time (tALE) and address hold time (tAHD) Supports address bus and data bus multiplex mode to save the address pins Supports configurable idle cycle for different access condition: Write command finish (W2X), Read-to-Read (R2R) |
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