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PC87366 bảng dữ liệu(PDF) 148 Page - National Semiconductor (TI) |
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PC87366 bảng dữ liệu(HTML) 148 Page - National Semiconductor (TI) |
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148 / 240 page ![]() 8.0 ACCESS.bus Interface (ACB) (Continued) 148 www.national.com 8.3 ACB REGISTERS The following abbreviations are used to indicate the Register Type: • R/W = Read/Write • R = Read from a specific address returns the value of a specific register. Write to the same address is to a different register. • W=Write • RO = Read Only • R/W1C = Read/Write 1 to Clear. Writing 1 to a bit clears it to 0. Writing 0 has no effect. 8.3.1 ACB Register Map 8.3.2 ACB Serial Data Register (ACBSDA) This shift register is used to transmit and receive data. The most significant bit is transmitted (received) first, and the least significant bit is transmitted (received) last. Reading or writing to the ACBSDA register is allowed only when the SDAST bit of the ACBST register is set, or for repeated starts after setting the START bit. An attempt to access this register under other conditions may produce unpredictable results. Location: Offset 00h Type: R/W Offset Mnemonic Register Name Type Section 00h ACBSDA ACB Serial Data R/W 8.3.2 01h ACBST ACB Status Varies per bit 8.3.3 02h ACBCST ACB Control Status Varies per bit 8.3.4 03h ACBCTL1 ACB Control 1 R/W 8.3.5 04h ACBADDR ACB Own Address R/W 8.3.6 05h ACBCTL2 ACB Control 2 R/W 8.3.7 Bit 76543210 Name ACB Serial Data Reset |
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