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KMA199 Datasheet(PDF) 16 Page - NXP Semiconductors |
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KMA199 Datasheet(HTML) 16 Page - NXP Semiconductors |
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16 / 36 page  KMA199_1 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 01 — 26 April 2010 16 of 36 NXP Semiconductors KMA199 Programmable angle sensor Angular error can be expressed by Equation 5 to Equation 8: for | α 1 − α0| ≤ 1° (5) for 1 ° < |α 1 − α0| < α* (6) for | α 1 − α0| ≥ α* (7) with: (8) 13. Programming 13.1 General description The KMA199 provides an OWI to enable programming of the device which uses pin OUT/DATA bidirectionally. In general the device runs in analog output mode, the normal operating mode. This mode is configured by the embedded programming data and is started after a power-on reset once time ton has elapsed. In this mode, the magnetic field angle is converted into the corresponding output voltage. Command mode has to be entered to enable programming. In this mode, the customer can adjust all required parameters (for example zero angle and angular range) to meet the application requirements. After enabling the internal charge pump and waiting for tcp the data is stored in the EEPROM. After changing the contents of the EEPROM, the checksum must be recalculated and written (see Section 13.4). In order to enter the command mode, a specific command sequence must be send after a power-on reset and during the time slot tcmd(ent). The external source used to send the command sequence must overdrive the output buffer of the KMA199 (I > Iod). φ Δ ang φ Δ μ lin Δφ temp RT + = φ Δ ang φ Δ μ lin Δφ temp RT + m ang α 1 α 0 – 1 ° – () × + = φ Δ ang φ Δ lin ()2 Δφ temp RT ()2 + = α∗ φ Δ ang(peak) φ Δ μ lin Δφ temp RT + – m ang ----------------------------------------------------------------------------------- α 0 1 ° ++ = |
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