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MAX6621 Datasheet(PDF) 6 Page - Maxim Integrated Products |
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MAX6621 Datasheet(HTML) 6 Page - Maxim Integrated Products |
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6 / 18 page  PECI-to-I2C Translator 6 _______________________________________________________________________________________ Configuration The MAX6621 has four configuration registers (Table 1). CONFIG0 is the main configuration register that enables the PECI sockets, I2C bus timeout, PEC, alert activation, and polling delay. CONFIG1 sets the number of retries, CONFIG2 sets the temperature offset, and CONFIG3 controls the temperature averaging. You can write to the configuration registers to set the configuration or read from the configuration registers to get the current settings. Detailed Description The MAX6621 obtains temperature data from an inter- nal temperature sensor in PECI-compliant hosts. Up to four PECI hosts can be connected to the PECI I/O inter- face. The MAX6621 handles all the PECI transmissions and uses a 2-wire, I2C-compatible serial interface to communicate with the PECI host. Registers and Commands The following is an overview of the I2C/SMBus regis- ters/commands supported by the MAX6621. ADDRESS DESCRIPTION TRANSACTION TYPE 00h Read socket 0, domain 0 temperature register ReadWord 01h Read socket 0, domain 1 temperature register ReadWord 02h Read socket 1, domain 0 temperature register ReadWord 03h Read socket 1, domain 1 temperature register ReadWord 04h Read socket 2, domain 0 temperature register ReadWord 05h Read socket 2, domain 1 temperature register ReadWord 06h Read socket 3, domain 0 temperature register ReadWord 07h Read socket 3, domain 1 temperature register ReadWord 08h Read maximum temperature for all enabled sockets/domains register ReadWord 09h Read firmware version register ReadWord 0Ah Read maximum temperature address ReadWord 0Bh Read socket and domain that caused alert ReadWord 0Ch Read/write CONFIG0 register ReadWord/WriteWord 0Dh Read/write CONFIG1 register ReadWord/WriteWord 0Eh Read/write CONFIG2 register ReadWord/WriteWord 0Fh Read/write CONFIG3 register ReadWord/WriteWord 10h Read/write alert temperature for socket 0 ReadWord/WriteWord 11h Read/write alert temperature for socket 1 ReadWord/WriteWord 12h Read/write alert temperature for socket 2 ReadWord/WriteWord 13h Read/write alert temperature for socket 3 ReadWord/WriteWord 14h Request polling SendByte 15h Clear alert SendByte COMMAND BYTE REGISTER DESCRIPTION TYPE RESULT 0Ch CONFIG0 register ReadWord/WriteWord See the CONFIG0 section. 0Dh CONFIG1 register ReadWord/WriteWord See the CONFIG1 section. 0Eh CONFIG2 register ReadWord/WriteWord See the CONFIG2 section. 0Fh CONFIG3 register ReadWord/WriteWord See the CONFIG3 section. Table 1. Configuration Registers |
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