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ADBMS1818ASWZ-R7 数据表(PDF) 57 Page - Analog Devices |
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ADBMS1818ASWZ-R7 数据表(HTML) 57 Page - Analog Devices |
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57 / 89 page  Data Sheet ADBMS1818 THEORY OF OPERATION analog.com Rev. 0 | 57 of 89 Bus Protocols The protocol formats for commands are depicted in Table 46, Table 47, and Table 48. Table 45 is the key for reading the protocol diagrams. Table 45. Protocol Key CMD0 Command Byte 0 (see Table 49) CMD1 Command Byte 1 (see Table 49) Table 45. Protocol Key PEC0 PEC Byte 0 (see Table 44) PEC1 PEC Byte 1 (see Table 44) n Number of bytes … Continuation of protocol Master to slave Slave to master Table 46. Poll Command 8 8 8 8 CMD0 CMD1 PEC0 PEC1 Poll Data Table 47. Write Command 8 8 8 8 8 8 8 8 8 8 CMD0 CMD1 PEC0 PEC1 Data byte low … Data byte high PEC0 PEC1 Shift Byte 1 … Shift Byte n Table 48. Read Command 8 8 8 8 8 8 8 8 8 8 CMD0 CMD1 PEC0 PEC1 Data byte low … Data byte high PEC0 PEC1 Shift Byte 1 … Shift Byte n Command Format: The format for the commands is shown in Table 49. CC, Bits[10:0] is the 11-bit command code. A list of all the command codes is shown in Table 50. All commands have a value 0 for CMD0, Bit 7 through CMD0, Bit 3. The PEC must be computed on the entire 16-bit command (CMD0 and CMD1). Table 49. Command Format Name R/W Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 CMD0 W 0 0 0 0 0 CC, Bit 10 CC, Bit 9 CC, Bit 8 CMD1 W CC, Bit 7 CC, Bit 6 CC, Bit 5 CC, Bit 4 CC, Bit 3 CC, Bit 2 CC, Bit 1 CC, Bit 0 Commands Table 50 lists all the commands and their options. Table 50. Command Codes Command Description Name CC, Bits[10:0] – Command Code 10 9 8 7 6 5 4 3 2 1 0 Write Configuration Register Group A WRCFGA 0 0 0 0 0 0 0 0 0 0 1 Write Configuration Register Group B WRCFGB 0 0 0 0 0 1 0 0 1 0 0 Read Configuration Register Group A RDCFGA 0 0 0 0 0 0 0 0 0 1 0 Read Configuration Register Group B RDCFGB 0 0 0 0 0 1 0 0 1 1 0 Read Cell Voltage Register Group A RDCVA 0 0 0 0 0 0 0 0 1 0 0 Read Cell Voltage Register Group B RDCVB 0 0 0 0 0 0 0 0 1 1 0 Read Cell Voltage Register Group C RDCVC 0 0 0 0 0 0 0 1 0 0 0 Read Cell Voltage Register Group D RDCVD 0 0 0 0 0 0 0 1 0 1 0 Read Cell Voltage Register Group E RDCVE 0 0 0 0 0 0 0 1 0 0 1 Read Cell Voltage Register Group F RDCVF 0 0 0 0 0 0 0 1 0 1 1 Read Auxiliary Register Group A RDAUXA 0 0 0 0 0 0 0 1 1 0 0 Read Auxiliary Register Group B RDAUXB 0 0 0 0 0 0 0 1 1 1 0 Read Auxiliary Register Group C RDAUXC 0 0 0 0 0 0 0 1 1 0 1 Read Auxiliary Register Group D RDAUXD 0 0 0 0 0 0 0 1 1 1 1 |
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