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ISL68227IRAZ Datasheet(PDF) 16 Page - Renesas Technology Corp |
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ISL68227IRAZ Datasheet(HTML) 16 Page - Renesas Technology Corp |
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16 / 100 page  ISL68227 3. Initializing the Device FN9333 Rev.1.00 Page 16 of 99 Oct.1.20 3.2 Selecting the PMBus Address A resistor reader selects the PMBus slave address.The ADDRESS pin reads the value of a resistor connected to GND to determine the PMBus address to use during host communication. Table 3 shows the RADDRESS values to specify the PMBus slave addresses (7-bit). 3.3 Selecting the User Configurations A user configuration is loaded for operation at power-up. The CONFIG pin reads the value of a resistor connected to GND to determine which user configuration is loaded. The ISL68227 supports 16 distinct configuration identifiers. Table 4 provides the RCONFIG value corresponding to each configuration identifier. A total of 28 one-time programmable non-volatile memory locations are available to store new user configurations or overwrite existing ones. With this flexibility, all 16 unique configurations can be written with 12 available overwrites, one configuration ID can be written up to 28 times, or any combination of configuration IDs can be written until the 28 write limit is reached. Only the most recent configuration for a given configuration ID can be loaded. When all 28 memory locations have been written, the ISL68227 no longer accepts attempts to write to NVM. PowerNavigator provides a simple interface to store and load configurations. Table 3. Resistor Value to PMBus Address Map R Value (Ω) PMBus Address R Value (Ω) PMBus Address 0 60 5230 51 162 61 5900 52 316 62 6650 53 487 63 7500 54 681 64 8450 55 887 65 9530 56 1130 66 10700 57 1370 67 12100 58 1650 45 13700 59 1960 46 15400 5A 2320 47 17400 5B 2670 4C 19600 5C 3090 4D 22100 5D 3570 4E 24300 5E 4120 4F 27400 5F 4640 50 30100 68 Table 4. Resistor Value to CONFIG ID Map R Value (Ω) Configuration ID R Value (Ω) Configuration ID 0 0 1650 8 162 1 1960 9 316 2 2320 10 487 3 2670 11 681 4 3090 12 887 5 3570 13 1130 6 4120 14 1370 7 4640 15 |
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