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SMM151 датащи(PDF) 18 Page - Summit Microelectronics, Inc. |
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SMM151 датащи(HTML) 18 Page - Summit Microelectronics, Inc. |
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18 / 23 page ![]() SMM151/152 Preliminary Datasheet Summit Microelectronics, Inc 2131 2.1 8/15/2008 18 I2C PROGRAMMING INFORMATION (CONTINUED) CONFIGURATION REGISTERS The majority of the configuration registers are grouped with the general-purpose memory. Writing and reading the configuration registers is shown in Figures 11, 12 and 13. Note: Configuration writes or reads of registers 00 to 03HEX must not be performed while the SMM151/152 is margining. GENERAL-PURPOSE MEMORY The 256-byte general-purpose memory is located at any slave address. The bus address bits are hard wired by the address pins A2, A1 and A0. They can be tied low, high or left floating, (Hi-Z). Memory writes and reads are shown in Figures 14, 15 and 16 . COMMAND AND STATUS REGISTERS Writes and reads of the command and status registers are shown in Figures 17 and 18. GRAPHICAL USER INTERFACE (GUI) Device configuration utilizing the Windows based SMM151/152 graphical user interface (GUI) is strongly recommended. The software is available from the Summit website (www.summitmicro.com). Using the GUI in conjunction with this datasheet simplifies the process of device prototyping and the interaction of the various functional blocks. A programming Dongle (SMX3202) is available from Summit to communicate with the SMM151/152. See Figure 9 and the SMX3202 Data Sheet (www.summitmicro.com). Slave Address Bus Address Register Type Configuration Registers are located in 00 HEX thru 05HEX and 30 HEX thru 3EHEX 10XX A2 A1 A0 General-Purpose Memory is located in 40 HEX thru FF HEX Table 1 - Address bytes used by the SMB151/152. Slave Address programmed as 10XX (Z = Hi-Z state) Pins A[2:0] A2 A1 A0 Slave Address Bus Address 0 0 0 1000 000 0 0 1 1000 001 0 0 Z 1000 010 0 1 0 1000 100 0 1 1 1000 101 0 1 Z 1000 110 0 Z X 1000 011 1 0 0 1001 000 1 0 1 1001 001 1 0 Z 1001 010 1 1 0 1001 100 1 1 1 1001 101 1 1 Z 1001 110 1 Z X 1001 011 Z 0 0 1010 000 Z 0 1 1010 001 Z 0 Z 1010 010 Z 1 0 1010 100 Z 1 1 1010 101 Z 1 Z 1010 110 Z Z X 1010 011 Table 2 – Example device addresses allowed by the SMM151. |
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