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ADM1032ARZREEL Datenblatt(PDF) 10 Page - ON Semiconductor |
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ADM1032ARZREEL Datenblatt(HTML) 10 Page - ON Semiconductor |
10 / 18 page ADM1032 http://onsemi.com 10 Table 11. CONSECUTIVE ALERT REGISTER CODES Register Value Number of Out-of-Limit Measurements Required yxxx 000x 1 yxxx 001x 2 yxxx 011x 3 yxxx 111x 4 NOTE: x = don’t care bits, and y = SMBus timeout bit. Default = 0. See SMBus section for more information. Serial Bus Interface Control of the ADM1032 is carried out via the serial bus. The ADM1032 is connected to this bus as a slave device, under the control of a master device. There is a programmable SMBus timeout. When this is enabled, the SMBus times out after typically 25 ms of no activity. However, this feature is not enabled by default. To enable it, set Bit 7 of the consecutive alert register (Address = 22h). Table 12. LIST OF ADM1032 REGISTERS Read Address (Hex) Write Address (Hex) Name Power-On Default Not Applicable Not Applicable Address Pointer Undefined 00 Not Applicable Local Temperature Value 0000 0000 (00h) 01 Not Applicable External Temperature Value High Byte 0000 0000 (00h) 02 Not Applicable Status Undefined 03 09 Configuration 0000 0000 (00h) 04 0A Conversion Rate 0000 1000 (08h) 05 0B Local Temperature High Limit 0101 0101 (55h) (85°C) 06 0C Local Temperature Low Limit 0000 0000 (00h) (0°C) 07 0D External Temperature High Limit High Byte 0101 0101 (55h) (85°C) 08 0E External Temperature Low Limit High Byte 0000 0000 (00h) (0°C) Not Applicable 0F One-Shot 10 Not Applicable External Temperature Value Low Byte 0000 0000 11 11 External Temperature Offset High Byte 0000 0000 12 12 External Temperature Offset Low Byte 0000 0000 13 13 External Temperature High Limit Low Byte 0000 0000 14 14 External Temperature Low Limit Low Byte 0000 0000 19 19 External THERM Limit 0101 0101 (55h) (85°C) (ADM1032) 0110 1100 (6Ch) (108°C) (ADM1032−1) 20 20 Local THERM Limit 0101 0101 (55h) (85°C) 21 21 THERM Hysteresis 0000 1010 (0Ah) (10°C) 22 22 Consecutive ALERT 0000 0001 (01h) FE Not Applicable Manufacturer ID 0100 0001 (41h) FF Not Applicable Die Revision Code Undefined NOTE: Writing to Address 0F causes the ADM1032 to perform a single measurement. It is not a data register as such and it does not matter what data is written to it. Addressing the Device In general, every SMBus device has a 7-bit device address (except for some devices that have extended, 10-bit addresses). When the master device sends a device address over the bus, the slave device with that address responds. The ADM1032 and the ADM1032−1 are available with one SMBus address, which is Hex 4C (1001 100). The ADM1032−2 is also available with one SMBus address; however, that address is Hex 4D (1001 101). The serial bus protocol operates as follows: 1. The master initiates data transfer by establishing a START condition, defined as a high-to-low transition on the serial data line SDATA, while the serial clock line SCLK remains high. This indicates that an address/data stream follows. All slave peripherals connected to the serial bus respond to the START condition and shift in the next eight bits, consisting of a 7-bit address (MSB first) plus an R/W bit, which determines the |
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