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MC1066 Datasheet(PDF) 11 Page - ON Semiconductor |
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MC1066 Datasheet(HTML) 11 Page - ON Semiconductor |
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11 / 16 page  MC1066 http://onsemi.com 11 REGISTER SET AND PROGRAMMER’S MODEL MC1066 Command Set The MC1066 supports four SMBus command protocols. These are READ_BYTE, WRITE_BYTE, SEND_BYTE, and RECEIVE_BYTE. See System Management Bus Specification Rev. 1.0 for details. Configuration Register (Config), 8–Bits, Read/Write Configuration Register (Config) D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] Mask1 Chip Stop Reserved Bit POR State Function Operation D[7] 0 Interrupt Mask (see text) 1 = mask ALERT/ COMP 0 = don’t mask ALERT/COMP D[6] 0 Standby switch 1 = standby, 0 = normal D[5]—D[0] 0 Reserved — Always re- turns zero when read. N/A A/D Conversion Rate Register (CONV_RATE), 8–Bits, Read/Write A/D Conversion Rate Register (CONV_RATE) D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] Reserved MSB X LSB Bit POR State Function Operation D[7:3] 0 Reserved — Always returns zero when read. N/A D[2:0] 010b Conversion rate bits. See below. A/D Conversion Rate Selection D2 D1 D0 Conversion Rate Samples/sec 0 0 0 0.0625 0 0 1 0.125 0 1 0 0.25 0 1 1 0.5 1 0 0 1.0 1 0 1 2.0 1 1 0 4.0 1 1 1 8.0 NOTE: Conversion rate denotes actual sampling of both internal and external sensors. Temperature Registers, 8–Bits, Read–Only (INT_TEMP, EXT_TEMP) The binary value (2’s complement format) in these two registers represents temperature of the internal and external sensors following a conversion cycle. The registers are automatically updated in an alternating manner. Internal Temperature Register (INT_TEMP) D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] MSB x x x x x x LSB External Temperature Register (EXT_TEMP) D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] MSB x x x x x x LSB Temperature Threshold Setpoint Registers, 8–Bits, Read–Write (INT_HLIM, INT_LLIM, EXT_HLIM, EXT_LLIM) These registers store the values of the upper and lower temperature setpoints for event detection. The value is in 2’s–complement binary. INT_HLIM and INT_LLIM are compared with the INT_TEMP value, and EXT_HLIM and EXT_LLIM are compared with EXT_TEMP. These registers may be written at any time. Internal High Limit Setpoint Register (INT_HLIM) D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] MSB x x x x x x LSB Internal Low Limit Setpoint Register (INT_LLIM) D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] MSB x x x x x x LS External High Limit Setpoint Register (EXT_HLIM) D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] MSB x x x x x x LSB External Low Limit Setpoint Register (EXT_LLIM) D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] MSB x x x x x x LSB NOTE: POR states: INT_HLIM 01111111b +127 °C INT_LLIM 11001001b —55 °C EXT_HLIM 01111111b +127 °C EXT_LLIM 11001001b —55 °C |
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