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AS1163 数据表(PDF) 66 Page - ams-OSRAM AG |
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AS1163 数据表(HTML) 66 Page - ams-OSRAM AG |
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66 / 91 page  AS1163 Command and register description Datasheet • PUBLIC • Document Feedback DS001075 • v2-00 • 2025-Nov-21 66 / 91 / Figure 27: I2CWRITE 12-bit addressing For details, please refer to application note “I²C bridge – SAID as I²C gateway AN001090”. 7.12.18 READLAST (0x1E) The READLAST returns the bytes from the last I²C transaction. The payload of the READLAST response is always 8 bytes; some constitute the bytes read, some are padding. If the last I2CREAD telegram instructed to read n bytes (n≤8) there are p=8-n padding bytes, and the READLAST response telegram has the following payload. Table 23: READLAST response telegram Payload offset 0 1 … p-1 p p+1 … 7 Payload content padding0 padding1 … paddingp-1 data0 data1 … datan-1 After every I²C read the data is stored in an internal 64-bit register, no answer is sent on the OSP line to not occupy the bus for a long time. With the READLAST it is possible to read this data after that the previous I²C read operation is completed (see status in READI2CCFG). |
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