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54AC646L 数据表(PDF) 3 Page - National Semiconductor (TI) |
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54AC646L 数据表(HTML) 3 Page - National Semiconductor (TI) |
3 / 10 page Function Table Inputs Data I/O (Note 1) Function G DIR CPAB CPBA SAB SBA A 0–A7 B 0–B7 H X H or L H or L X X Isolation HX N X X X Input Input Clock A n Data into A Register HX X N X X Clock B n Data into B Register LH X X L X A n to Bn — Real Time (Transparent Mode) LH N X L X Input Output Clock A n Data into A Register L H H or L X H X A Register to B n (Stored Mode) LH N X H X Clock A n Data into A Register and Output to Bn LL X X X L B n to An — Real Time (Transparent Mode) LL X N X L Output Input Clock B n Data into B Register L L X H or L X H B Register to A n (Stored Mode) LL X N X H Clock B n Data into B Register and Output to An H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial N = LOW-to-HIGH Transition Note 1: The data output functions may be enabled or disabled by various signals at the G and DIR inputs. Data input functions are always enabled; i.e., data at the bus pins will be stored on every LOW-to-HIGH transition of the appropriate clock inputs. www.national.com 3 |
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类似说明 - 54AC646L |
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