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TSS400CFN-S2 Datasheet(PDF) 4 Page - Texas Instruments |
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TSS400CFN-S2 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 32 page TSS400-S2 µPOWER PROGRAMMABLE HIGH-PRECISION SENSOR SIGNAL PROCESSOR SLMS002 – D4101, OCTOBER 1993 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description (continued) The TSS400-S2 is designed to meet a wide variety of sensor systems applications including those that require short time-to-market and rapid and / or frequent programming updates. The TSS400-S2 does not require mask programming. It can be purchased in any quantity. Typical applications include: • Measurements of temperature, pressure, acceleration, gas content, magnetic field, relative humidity, speed, direction, and volume • Measurements requiring calculation, control, and/or warning functions • Measurements where temperature compensation is required for accuracy • Measurements where software calibration and linearization is desirable These sensor systems can be found in many types of applications including home appliances, industrial control subsystems, HVAC systems and instrumentation, portable instrumentation, consumer products, automotive products, or where precise ( 12-bit ), ultra-low power ( 12 µA–15 µA typ), intelligent A/D conversion is essential. The TSS400-S2 is available in two temperature ranges. The TSS400CFN-S2 is characterized for operation from 0 °C to 70°C. The TSS400QFN-S2 is characterized for operation from –40°C to 105°C. initialization and power up Initialization is started by hardware in two ways: • Power Up: The voltage V DD is switched on ( cold start ). The CPU starts to work at PC 000 after the internal oscillator has started operation. This may take from 1 to 6 seconds. • INITN: INITN is held low (switched to ground) for more than 10 µs. When this occurs during program execution, it is called a warm start . The CPU starts operation at PC 000 when INITN is released to VDD potential. Table 1 lists the TSS400-S2 register contents after a power up or an INITN-terminal initialization. Table 1. Register Contents REGISTER POWER UP ( COLD START ) INITN TERMINAL ( WARM START ) Program counter ( PC ) 000 000 Status bits POS, NEG, and ZERO undefined unchanged RAM contents † reset to 0 unchanged Digit latches ( DLn ) reset to 0 reset to 0 K lines’ latch contents undefined unchanged Timers 0 unchanged ADC voltage SVDD switched off switched off LCD segment latches undefined unchanged Subroutine stack level 0 level 0 † Despite the RAM remaining unchanged during a warm start, the memory addressed when INITN is activated may be destroyed by a write cycle. |
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