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LM73CIMK bảng dữ liệu(PDF) 10 Page - National Semiconductor (TI) |
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LM73CIMK bảng dữ liệu(HTML) 10 Page - National Semiconductor (TI) |
10 / 18 page 1.0 Functional Description (Continued) 1.6 COMMUNICATING with the LM73 The data registers in the LM73 are selected by the Pointer Register. At power-up the Pointer Register is set to “00h”, the location for the Temperature Register. The Pointer Register latches the last location it was set to. Note that all Pointer Register bits are decoded; any incorrect pointer values will not be acknowledged and will not be stored in the Pointer Register (Note 13). A Write to the LM73 will always include the address byte and the pointer byte. A Read from the LM73 can take place either of two ways: 1. If the location latched in the Pointer Register is correct (that is, the Pointer Register is pre-set prior to the read), then the read can simply consist of an address byte, followed by retrieving the data byte. Most of the time it is expected that the Pointer Register will point to Tempera- ture Registers because that will be the data most fre- quently read from the LM73. 2. If the Pointer Register needs to be set, then an address byte, pointer byte, repeat start, and another address byte will accomplish a read. The data byte is read out of the LM73 by the most significant bit first. At the end of a read, the LM73 can accept either an Acknowledge or No Acknowledge bit from the Master. No Acknowledge is typically used as a signal to the slave that the Master has read its last byte. 20147816 FIGURE 1. ALERT Temperature Response cleared when temperature crosses T LOW 20147817 FIGURE 2. ALERT Temperature Response cleared by writing a "1" to the ALERT Reset Bit. www.national.com 10 |
Số phần tương tự - LM73CIMK |
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Mô tả tương tự - LM73CIMK |
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