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BU2505FV Datenblatt(PDF) 4 Page - Rohm |
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BU2505FV Datenblatt(HTML) 4 Page - Rohm |
4 / 11 page BU2506FV,BU2505FV Technical Note 4/10 www.rohm.com 2011.04 - Rev.B © 2011ROHM Co., Ltd. All rights reserved. ● Cascade Connection A data output terminal for cascade connection (DO) is available for reducing the number of parts when it is increased. The DO terminal can be connected to a data input terminal (DI) of the next IC. However, DO transition is synchronized with rising edge of clock signal, DO signal should be delayed, to keep a limit of data hold time. For example RC passive filter can be used. Also in some cases, an operation frequency of logic signal have to be decreased to ensure a margin of data setup time. Therefore, it is better to control LD port of each LSI separately, if extra CPU ports are available. In this case, more ports to control LD signals are needed, but a consideration described above doesn’t have do be done. BU2505FV BU2506FV (#2) BU2505FV BU2506FV (#1) LD CLK DI LD CLK DI LD1 LD2 DI CLK BU2505FV BU2506FV DO LD CLK DI (#2) BU2505FV BU2506FV DO LD CLK DI (#1) CPU LD CLK DI |
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