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ADM1024 bảng dữ liệu(PDF) 10 Page - ON Semiconductor |
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ADM1024 bảng dữ liệu(HTML) 10 Page - ON Semiconductor |
10 / 30 page ADM1024 www.onsemi.com 10 the serial bus address, R/W bit set to 1, followed by the data byte read from the data register. This is shown in Figure 12. 2. If the Address Pointer Register is known to be already at the desired address, data can be read from the corresponding data register without first writing to the Address Pointer Register, so Figure 11 can be omitted. Figure 10. Writing a Register Address to the Address Pointer Register, then Writing Data to the Selected Register 0 SCL SDA 10 1 1 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 D0 1 9 SCL (CONTINUED) SDA (CONTINUED) ACK. BY ADM1024 ACK. BY ADM1024 ACK. BY ADM1024 START BY MASTER STOP BY MASTER FRAME 1 SERIAL BUS ADDRESS BYTE FRAME 2 ADDRESS POINTER REGISTER BYTE FRAME 3 DATA BYTE D1 D2 D3 D4 D5 D6 D7 R/W 1 9 91 Figure 11. Writing to the Address Pointer Register Only STOP BY MASTER D0 1 9 D1 D2 D3 D4 D5 D6 D7 0 SCL SDA 1 0 1 1 A1 A0 ACK. BY ADM1024 ACK. BY ADM1024 START BY MASTER FRAME 1 SERIAL BUS ADDRESS BYTE FRAME 2 ADDRESS POINTER REGISTER BYTE R/W 19 Figure 12. Reading Data from a Previously Selected Register STOP BY MASTER 1 9 SCL ACK. BY ADM1024 START BY MASTER FRAME 1 SERIAL BUS ADDRESS BYTE 19 R/W 0 1 1 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0 0 1 SDA NO ACK. BY MASTER FRAME 2 DATA BYTE FROM ADM1024 NOTES 1. Although it is possible to read a data byte from a data register without first writing to the Address Pointer Register, if the Address Pointer Register is already at the correct value, it is not possible to write data to a register without writing to the Address Pointer Register because the first data byte of a write is always written to the Address Pointer Register. 2. In Figure 10 to Figure 12, the serial bus address is shown as the default value 01011(A1)(A0), where A1 and A0 are set by the three−state ADD pin. Measurement Inputs The ADM1024 has nine external measurement pins that can be configured to perform various functions by programming the Channel Mode Register. |
Số phần tương tự - ADM1024_16 |
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Mô tả tương tự - ADM1024_16 |
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