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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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UJA1069 Arkusz danych(PDF) 35 Page - NXP Semiconductors |
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UJA1069 Arkusz danych(HTML) 35 Page - NXP Semiconductors |
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35 / 64 page  UJA1069_2 © NXP B.V. 2007. All rights reserved. Preliminary data sheet Rev. 02 — 5 March 2007 35 of 64 NXP Semiconductors UJA1069 LIN fail-safe system basis chip [1] See Section 6.13.1. [2] Not supported for the UJA1069TW/3V0 and UJA1069TW/3V3 version. [3] Not supported for the UJA1069TW/3V0 version. 6.12.11 General Purpose registers and General Purpose Feedback registers The UJA1069 offers two 12-bit General Purpose registers (and accompanying General Purpose Feedback registers) with no predefined bit definition. These registers can be used by the microcontroller for advanced system diagnosis or for storing critical system status information outside the microcontroller. After Power-up General Purpose register 0 will contain a ‘Device Identification Code’ consisting of the SBC type and SBC version. This code is available until it is overwritten by the microcontroller (as indicated by the DIC bit). [1] The Device Identification Control bit is cleared during power-up of the SBC, indicating that General Purpose register 0 is loaded with the Device Identification Code. Any write access to General Purpose register 0 will set the DIC bit, regardless of the value written to DIC. [2] During power-up the General Purpose register 0 is loaded with a ‘Device Identification Code’ consisting of the SBC type and SBC version, and the DIC bit is cleared. 4 and 3 V1RTHC [1:0] V1 Reset Threshold Control 11 V1 reset threshold = 0.9 × V V1(nom) 10 V1 reset threshold = 0.7 × V V1(nom) [2] 01 V1 reset threshold = 0.8 × V V1(nom) [3] 00 V1 reset threshold = 0.9 × V V1(nom) 2 to 0 - reserved 000 reserved for future use; should remain cleared to ensure compatibility with future functions which might use this bit Table 12. Special Mode register and Special Mode Feedback register bit description …continued Bit Symbol Description Value Function Table 13. General Purpose register 0 and General Purpose Feedback register 0 bit description Bit Symbol Description Value Function 15, 14 A1, A0 register address 10 read the General Purpose Feedback register 0 13 RRS Read Register Select 1 read the General Purpose Feedback register 0 0 read the System Configuration Feedback register 12 RO Read Only 1 read the register selected by RRS without writing to the General Purpose register 0 0 read the register selected by RRS and write to the General Purpose register 0 11 DIC Device Identification Control[1] 1 General Purpose register 0 contains user-defined bits 0 General Purpose register 0 contains the Device Identification Code 10 to 0 GP0[10:0] General Purpose bits[2] 1 user-defined 0 user-defined Table 14. General Purpose register 1 and General Purpose Feedback register 1 bit description Bit Symbol Description Value Function 15 and 14 A1, A0 register address 11 select General Purpose register 1 13 RRS Read Register Select 1 read the General Purpose Feedback register 1 0 read the Physical Layer Control Feedback register |
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