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TMP411-Q1 Datasheet(PDF) 17 Page - Texas Instruments |
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TMP411-Q1 Datasheet(HTML) 17 Page - Texas Instruments |
17 / 40 page ![]() TMP411-Q1 www.ti.com SBOS527F – DECEMBER 2010 – REVISED NOVEMBER 2013 CONFIGURATION REGISTER If AL/TH = 1, the ALERT/THERM2 pin implements a THERM function (THERM2). In this mode, THERM2 The Configuration Register sets the temperature functions similarly to the THERM pin except that the range, controls shutdown mode, and determines how local high limit and remote high limit registers are the ALERT/THERM2 pin functions. The Configuration used for the thresholds. THERM2 goes low when Register is set by writing to pointer address 09h and either RHIGH or LHIGH is set. read by reading from pointer address 03h. The temperature range is set by configuring bit 2 of The MASK bit (bit 7) enables or disables the ALERT the Configuration Register. Setting this bit low pin output if AL/TH = 0. If AL/TH = 1, then the MASK configures the TMP411-Q1 for the standard bit has no effect. If MASK is set to 0, the ALERT pin measurement range (0°C to 127°C), and temperature goes low when one of the temperature measurement conversions are stored in the standard binary format. channels exceeds its high or low limits for the chosen Setting bit 2 high configures the TMP411-Q1 for the number of consecutive conversions. If the MASK bit extended measurement range (–55°C to 150°C) is set to 1, the TMP411-Q1 retains the ALERT pin temperature conversions are stored in the extended status, but the ALERT pin does not go low. binary format (see Table 1). The shutdown (SD) bit (bit 6) enables or disables the The remaining bits of the Configuration Register are temperature measurement circuitry. If SD = 0, the reserved and must always be set to 0. The power-on- TMP411-Q1 converts continuously at the rate set in reset value for this register is 00h. Table 6 the conversion rate register. When SD is set to 1, the summarizes the bits of the Configuration Register. TMP411-Q1 immediately stops converting and enters a shutdown mode. When SD is set to 0 again, the NOTE TMP411-Q1 resumes continuous conversions. A The TMP411x-Q1 device single conversion can be started when SD = 1 by family is set to standard writing to the One-Shot Register. temperature range as default. The AL/TH bit (bit 5) controls whether the ALERT pin Therefore, the device always functions in ALERT mode or THERM2 mode. If needs to be configured to AL/TH = 0, the ALERT pin operates as an interrupt extended temperature range pin. In this mode, the ALERT pin goes low after the after power-up if this feature is set number of consecutive out-of-limit temperature used. measurements occurs. Table 6. Configuration Register Bit Descriptions CONFIGURATION REGISTER (Read = 03h, Write = 09h, POR = 00h) BIT NAME FUNCTION POWER-ON RESET VALUE 7 MASK 0 = ALERT enabled; 1 = ALERT masked 0 6 SD 0 = Run; 1 = Shut down 0 5 AL/TH 0 = ALERT mode; 1 = THERM mode 0 4, 3 Reserved — 0 2 Temperature range 0 = 0°C to 127°C; 1 = –55°C to 150°C 0 1, 0 Reserved — 0 Copyright © 2010–2013, Texas Instruments Incorporated Submit Documentation Feedback 17 Product Folder Links: TMP411-Q1 |
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