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MFS5600AMBAFES データシート(PDF) 56 Page - NXP Semiconductors |
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MFS5600AMBAFES データシート(HTML) 56 Page - NXP Semiconductors |
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56 / 118 page  NXP Semiconductors FS5600 Automotive buck regulator and controller with voltage monitors and watchdog timer Register name Register names (Continued) FLT_ERR_CNT_LIMIT[1:0] NOT_WD_ERR_LIMIT[1:0] WD_ERR_LIMIT[1:0] NOT_WD_RFR_LIMIT[1:0] WD_RFR_LIMIT[1:0] NOT_WD_FAIL_IMPACT[1:0] WD_FAIL_IMPACT[1:0] CLR_FLT_ERR_CNT FCCU12_FLT_POL NOT_CLR_FLT_ERR_CNT Table 47. List of registers modifiable only during INIT_RUN state...continued The following registers are protected after the first WD_OK in the INIT_RUN if the watchdog is enabled. These are: Register name Register names (Continued) FLT_ERR_CNT_LIMIT[1:0] NOT_FLT_ERR_CNT_LIMIT[1:0] WD_ERR_LIMIT[1:0] NOT_WD_ERR_LIMIT[1:0] WD_RFR_LIMIT[1:0] NOT_WD_RFR_LIMIT[1:0] WD_FAIL_IMPACT[1:0] NOT_WD_FAIL_IMPACT[1:0] CLR_FLT_ERR_CNT NOT_CLR_FLT_ERR_CNT Table 48. INIT_RUN protected registers after first WD_OK if watchdog enabled. 17.11 Fault error counter A fault error counter is implemented to count the number of faults occurring in the application and based on system reaction. The limit value of the fault error counter is programmable using the FLT_ERR_CNT_LIMIT[1:0] bits. Note: “FLT_ERR_CNT_LIMIT[1:0]” should be initialized in the application once during system power-up. Changing it during normal operation may reset the FLT_ERR_CNT value. FLT_ERR_CNT_LIMIT[1:0] Configure the maximum value of the Fault error counter 00 Max value = 1 01 (Reset State) Max value = 2 10 Max value = 6 11 Max value = 12 Table 49. FLT_ERR_CNT_LIMIT[1:0] description The fault error counter value is stored in the FLT_ERR_CNT[3:0] bits and starts at “0” after a POR. The FLT_ERR_CNT[3:0] may be cleared in the application via I2C by writing 0b1 to the CLR_FLT_ERR_CNT bit and 0b0 to the NOT_CLR_FLT_ERR_CNT bit. The FLT_ERR_CNT[3:0] decrements by '1' when the watchdog timer is refreshed after the watchdog refresh counter reaches its maximum value. Note: Use the CLR_FLT_ERR_CNT bit only if the watchdog is disabled. If watchdog is enabled, use that to decrement the FLT_ERR_CNT[3:0]. Using the CLR_FLT_ERR_CNT when watchdog is enabled is not recommended. The fault error counter is incremented each time an assigned fault occurs. FS5600 All information provided in this document is subject to legal disclaimers. © 2024 NXP B.V. All rights reserved. Product data sheet Rev. 4 — 29 April 2024 56 / 118 |
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