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22 page 
1°C Multiple Temperature Sensor with HW Thermal Shutdown & Hottest of Thermal Zones Datasheet Revision 0.62 (03-05-08) 22 SMSC EMC1046/EMC1047 DATASHEET 5.1 Data Read Interlock When any temperature channel high byte register is read, the corresponding low byte is copied into an internal ‘shadow’ register. The user is free to read the low byte at any time and be guaranteed that it will correspond to the previously read high byte. Regardless if the low byte is read or not, reading from the same high byte register again will automatically refresh this stored low byte data. 5.2 Temperature Data Registers All temperatures are stored as an 11-bit value with the high byte representing the integer value and the low byte representing the fractional value left justified to occupy the MSBits. The data format is standard 2’s complement from -64°C to 127.875°C as shown in Table 5.3. Table 5.2 Temperature Data Registers ADDR R/W REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT 00h R Internal Diode High Byte Sign 64 32 16 8 4 2 1 29h R Internal Diode Low Byte 0.5 0.25 0.125 - - - - - 00h 01h R External Diode1 High Byte Sign 64 32 16 8 4 2 1 00h 10h R External Diode 1 Low Byte 0.5 0.25 0.125 - - - - - 00h 23h R External Diode 2 High Byte Sign 64 32 16 8 4 2 1 00h 24h R External Diode 2 Low Byte 0.5 0.25 0.125 - - - - - 2Ah R External Diode 3 High Byte Sign 64 32 16 8 4 2 1 2Bh R External Diode 3 Low Byte 0.5 0.25 0.125 - - - - - 41h R External Diode 4 High Byte Sign 64 32 16 8 4 2 1 42h R External Diode 4 Low Byte 0.5 0.25 0.125 - - - - - 00h 43h R External Diode 5 High Byte Sign 64 32 16 8 4 2 1 00h 44h R External Diode 5 Low Byte 0.5 0.25 0.125 - - - - - 00h 45h R External Diode 6 High Byte Sign 64 32 16 8 4 2 1 00h 46h R External Diode 6 Low Byte 0.5 0.25 0.125 - - - - - 00h |
