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MCP98244 Datasheet(PDF) 12 Page - Microchip Technology |
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MCP98244 Datasheet(HTML) 12 Page - Microchip Technology |
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12 / 52 page  MCP98244 DS22327C-page 12 2012-2013 Microchip Technology Inc. 5.1 Registers The MCP98244 device has several registers that are user-accessible. These registers include the Capability register, Configuration register, Event Temperature Upper-Boundary and Lower-Boundary Trip registers, Critical Temperature Trip register, Temperature register, Manufacturer Identification register and Device Identification register. The Temperature register is read-only, used to access the ambient temperature data. The data is loaded in parallel to this register after tCONV. The Event Temperature Upper-Boundary and Lower-Boundary Trip registers are read/writes. If the ambient temperature drifts beyond the user-specified limits, the MCP98244 device outputs a signal using the Event pin (refer to Section 5.2.3 “Event Output Configuration” ). In addition, the Critical Temperature Trip register is used to provide an additional critical temperature limit. The Capability register is used to provide bits describing the MCP98244’s capability in measurement resolution, measurement range and device accuracy. The device Configuration register provides access to configure the MCP98244’s various features. These registers are described in further detail in the following sections. The registers are accessed by sending a Register Pointer to the MCP98244 using the serial interface. This is an 8-bit write-only pointer, and Register 5-1 describes the pointer assignment. REGISTER 5-1: REGISTER POINTER (WRITE ONLY) W-0 W-0 W-0 W-0 W-0 W-0 W-0 W-0 — — — — Pointer Bits bit 7 bit 0 Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown bit 7-4 Writable Bits: Write ‘0’ bit 3-0 Pointer Bits: 0000 = Capability register 0001 = Configuration register (CONFIG) 0010 = Event Temperature Upper-Boundary Trip register (TUPPER) 0011 = Event Temperature Lower-Boundary Trip register (TLOWER) 0100 = Critical Temperature Trip register (TCRIT) 0101 = Temperature register (TA) 0110 = Manufacturer ID register 0111 = Device ID/Revision register 1000 = TSE2004av Device ID and Vendor Silicon Revision Register 1001 = Resolution register 1XXX = Unused (The device will not acknowledge commands to other pointer locations.). |
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