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L9963E 数据表(PDF) 20 Page - STMicroelectronics |
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L9963E 数据表(HTML) 20 Page - STMicroelectronics |
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20 / 184 page  Symbol Parameter Test conditions Min. Typ. Max. Unit tCYCLIC_SLEEP_011 Tested by SCAN 800 ms tCYCLIC_SLEEP_100 Tested by SCAN 1600 ms tCYCLIC_SLEEP_101 Tested by SCAN 3200 ms tCYCLIC_SLEEP_110 Tested by SCAN 6400 Ms tCYCLIC_SLEEP_111 Tested by SCAN 1280 0 Ms TVREG_OFF Tested by SCAN 500 μs FMAIN_OSC_stby Internal standby Oscillator frequency 20 32 45 KHz FAUX_OSC_stby Internal standby redundant Oscillator frequency 20 32 45 KHz timeout_VCOM_UP_first Timeout at first power up. From wakeup event to VCOM_UV release Tested by SCAN 8 ms timeout_VCOM_UP Default power up timeout. From wakeup event to VCOM_UV release Tested by SCAN 4 ms timeout_OSCI_MAIN From wakeup event to main oscillator stable Tested by SCAN 10 ms timeout_POR_MAIN VANA settling time timeout Tested by SCAN 1.5 ms TBOOT_DELAY Delay between VTREF enable and Bootstrap enable Tested by SCAN 200 μs TVTREF_DELAY Delay between VANA_UV release (POR_STBY asserted after TPOR_FILT) and VTREF enable Tested by SCAN 630 μs TVCOM_DELAY Delay between VTREF enable and VCOM enable Tested by SCAN 400 μs TWAKEUP_TIMEOUT_ISO Timeout of the pulse counter for wakeup detection (isolated SPI) Tested by SCAN 282 μs TWAKEUP_TIMEOUT_SPI Timeout of the pulse counter for wakeup detection (SPI) Tested by SCAN 84 138 μs TWAKEUP_NCS_HIGH Minimum NCS high time before sending SPI wake up frame Tested by SCAN 400 μs 4.2 Serial communication interface Two types of serial communication ports are included in L9963E: SPI and isolated interface: • SPI can be used for the local communication between MCU and the closest L9963E • Isolated SPI can be used for the global communication between several L9963E stacked in a daisy chain Refer to Section 6.11 Communication architectures for all the different application scenarios. The frequencies on the 2 communication interfaces are different and not related. From micro-controller point of view a daisy chain of many L9963E devices is controlled as a single device addressable by using both the device ID and the device’s internal register addresses. 4.2.1 Communication interface selection Two communication ports are available: • Port H: implemented via the ISOHp and ISOHm pins. It always works as Isolated SPI interface. It can be enabled by setting isotx_en_h = 1 • Port L: implemented via the ISOLp_SDI, ISOLm_NCS, GPIO8_SCK, GPIO9_SDO pins. It is always enabled and its configuration is latched upon first powe up and depends on the SPIEN pin L9963E Serial communication interface DS13636 - Rev 12 page 20/184 |
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