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TMP411-Q1 Datasheet(PDF) 12 Page - Texas Instruments |
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TMP411-Q1 Datasheet(HTML) 12 Page - Texas Instruments |
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12 / 33 page  TMP411 SBOS383C − DECEMBER 2006 − REVISED MAY 2008 www.ti.com 12 CONFIGURATION REGISTER The Configuration Register sets the temperature range, controls shutdown mode, and determines how the ALERT/THERM2 pin functions. The Configuration Register is set by writing to pointer address 09h and read by reading from pointer address 03h. The MASK bit (bit 7) enables or disables the ALERT pin output if AL/TH = 0. If AL/TH = 1 then the MASK bit has no effect. If MASK is set to ‘0’, the ALERT pin goes low when one of the temperature measurement channels exceeds its high or low limits for the chosen number of consecutive conversions. If the MASK bit is set to ‘1’, the TMP411 retains the ALERT pin status, but the ALERT pin will not go low. The shutdown (SD) bit (bit 6) enables or disables the temperature measurement circuitry. If SD = 0, the TMP411 converts continuously at the rate set in the conversion rate register. When SD is set to ‘1’, the TMP411 immediately stops converting and enters a shutdown mode. When SD is set to ‘0’ again, the TMP411 resumes continuous conversions. A single conversion can be started when SD = 1 by writing to the One-Shot Register. The AL/TH bit (bit 5) controls whether the ALERT pin functions in ALERT mode or THERM2 mode. If AL/TH = 0, the ALERT pin operates as an interrupt pin. In this mode, the ALERT pin goes low after the set number of consecutive out-of-limit temperature measurements occur. If AL/TH = 1, the ALERT/THERM2 pin implements a THERM function (THERM2). In this mode, THERM2 functions similar to the THERM pin except that the local high limit and remote high limit registers are used for the thresholds. THERM2 goes low when either RHIGH or LHIGH is set. The temperature range is set by configuring bit 2 of the Configuration Register. Setting this bit low configures the TMP411 for the standard measurement range (0 °C to +127 °C); temperature conversions will be stored in the standard binary format. Setting bit 2 high configures the TMP411 for the extended measurement range (−55 °C to +150 °C); temperature conversions will be stored in the extended binary format (see Table 1). The remaining bits of the Configuration Register are reserved and must always be set to ‘0’. The power-on reset value for this register is 00h. Table 5 summarizes the bits of the Configuration Register. Table 5. 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 |
Similar Part No. - TMP411-Q1 |
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Similar Description - TMP411-Q1 |
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