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EVB-EMC1053 Datasheet(PDF) 10 Page - SMSC Corporation |
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EVB-EMC1053 Datasheet(HTML) 10 Page - SMSC Corporation |
10 / 26 page 1°C Triple Temperature Sensor with Resistance Error Correction & Hotter of Two Zones Datasheet Revision 1.37 (02-05-07) 10 SMSC EMC1053 DATASHEET 2.3.3 Send Byte The Send Byte protocol is used to set the Internal Address Register to the correct Address as shown in Table 2.5. The Send Byte can be followed by the Receive Byte protocol described in Table 2.6 to read data from the register. The send byte protocol cannot be used to write data - if data is to be written to a register then the write byte protocol must be used as described in Section 2.3.1. 2.3.4 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 in Table 2.6. 2.3.5 SMBus Timing Diagram The Timing for the SMBus is shown in Figure 2.1. 2.4 SMBus Addresses The EMC1053 communicates at SMBus Address 1001100b. Attempting to communicate with the EMC1053 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 EMC1053 supports stretching of the SMCLK signal by other devices on the SMBus but will not perform this operation itself. 2.5 SMBus Timeout The EMC1053 includes an SMBus time-out feature. Following a 25 ms period of inactivity on the SMBus, the device will time-out and reset the SMBus interface. Table 2.5 Send Byte Protocol START SLAVE ADDR WR ACK REG. ADDR ACK STOP 17 1 18 11 Table 2.6 Receive Byte Protocol START SLAVE ADDR RD ACK REG. DATA NACK STOP 17 1 1 81 1 |
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