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EMC1033 Datasheet(PDF) 8 Page - SMSC Corporation |
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EMC1033 Datasheet(HTML) 8 Page - SMSC Corporation |
8 / 24 page 1°C Triple SMBus Sensor with Resistance Error Correction Datasheet Revision 1.2 (12-18-07) 8 SMSC EMC1033 DATASHEET 3.4 Receive Byte The Receive Byte protocol is used to read data from a register when the internal register address pointer is known to be at the right location (e.g. set via Send Byte). This can be used for consecutive reads of the same register as shown below: 3.5 Alert Response Address The ALERT/THERM2 output can be used as an SMBALERT# as described in Section 4.5 on page 12. The Alert Response Address is polled by the Host whenever it detects an SMBALERT#, i.e. when the ALERT /THERM2 pin is asserted. The EMC1033 will acknowledge the Alert Response Address and respond with its device address as shown below. 3.6 SMBus Addresses The EMC1033 may be configured to one of four 7-bit slave addresses that are enabled based on the pull-up resistor on the ADDR/THERM pin. The value of this pull up resistor determines the slave address per Table 1.2 on page 3. Attempting to communicate with the EMC1033 SMBus interface with an invalid slave address or invalid protocol results in no response from the device and does not affect its register contents. The EMC1033 supports stretching of the SMCLK signal by other devices on the SMBus but will not perform this operation itself. The EMC1033 has an SMBus timeout feature. Bit 7 of the Consecutive Alert register enables this function when set to 1 (the default setting is 0). When this feature is enabled, the SMBus will timeout after approximately 25ms of inactivity. Table 3.4 SMBus Receive Byte Protocol FIELD: START SLAVE ADDR RD ACK REG. DATA NACK STOP Bits: 17 1 1 8 1 1 Table 3.5 Modified SMBus Receive Byte Protocol Response to ARA FIELD: START ALERT RESPONSE ADDRESS RD ACK EMC1033 SLAVE ADDRESS NACK STOP Bits: 17 1 1 8 1 1 |
Similar Part No. - EMC1033_08 |
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Similar Description - EMC1033_08 |
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