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ADBMS1818ASWZ-R7 数据表(PDF) 61 Page - Analog Devices |
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ADBMS1818ASWZ-R7 数据表(HTML) 61 Page - Analog Devices |
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61 / 92 page  Data Sheet ADBMS1818 THEORY OF OPERATION analog.com Rev. B | 61 of 92 Bus Protocols The protocol formats for commands are depicted in Table 48, Table 49, and Table 50. Table 47 is the key for reading the protocol diagrams. Table 47. Protocol Key Byte Description CMD0 Command Byte 0 (see Table 51) CMD1 Command Byte 1 (see Table 51) Table 47. Protocol Key (Continued) Byte Description PEC0 PEC Byte 0 (see Table 46) PEC1 PEC Byte 1 (see Table 46) n Number of bytes … Continuation of protocol Master to slave Slave to master Table 48. Poll Command 8 8 8 8 CMD0 CMD1 PEC0 PEC1 Poll Data Table 49. 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 50. 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 51. CC, Bits[10:0] is the 11-bit command code. A list of all the command codes is shown in Table 52. 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 51. 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 52 lists all the commands and their options. Table 52. 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 |
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