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STPM098C 数据表(PDF) 22 Page - STMicroelectronics |
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STPM098C 数据表(HTML) 22 Page - STMicroelectronics |
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22 / 110 page  Table 16. ABIST activation register ABIST_EN Description 0 ABIST procedure disabled (default) 1 ABIST procedure enabled When both are enabled, the MBIST procedure is carried out first. When MBIST is performed: • If no MBIST error is detected, the procedure is ended and the state machine evolves to the next stage; • If an MBIST error is detected, the device reacts by establishing SAFE_HIZ and preventing any further device operation. The device persists in this state until another power-up sequence is forced. When ABIST is performed: • If no ABIST error is detected, the procedure is ended and the state machine evolves to the next stage; • If an ABIST error is detected, the ABIST_FAIL bit is set and the state machine evolves to the next stage. Table 17. ABIST status register ABIST_FAIL Description 0 NO ABIST failure 1 ABIST procedure failure MBIST FAIL state corresponds to LOCKUP STATE. Figure 14. BIST procedure state machine NVM DWNL nvm_dwnl_end=‘1’ (10us deglitch) & memory_bist_enable=‘0’ & abist_disable=‘1’ abist_end=‘1’ MBIST RUN ADDR LATCH ABIST RUN nvm_dwnl_end=‘1’ (10us deglitch) & memory_bist_enable=‘1’ mbist_end=‘1’ & memory_bist_fail=‘0’ (or mbist_fail_enable=‘0’) & abist_disable=‘1’ mbist_end=‘1’ & memory_bist_fail=‘0’ (or mbist_fail_enable=‘0’) & abist_disable=‘0’ MBIST FAIL mbist_end=‘1’ & memory_bist_fail=‘1’ & mbist_fail_enable=‘1’ To FULL ON From WAIT POR_ANA RELEASE nvm_dwnl_end=‘1’ (10us deglitch) & memory_bist_enable=‘1’ & abist_disable=‘0’ BIST mode retriggering In case of a fault detection during the analog BIST check at power-up (ABIST_FAIL = 1), a fault confirmation can be performed by triggering an additional procedure run through the two dedicated PMBus™ commands MFR_ABIST_RESTART and MFR_ADC_SELFTEST_RESTART. STPM098C Functional description DS14440 - Rev 1 page 22/110 |
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