1.11 For higher cell counts such as

1.11 For higher cell counts such as 20 cells, is there any recommendation on how to
stack the bq76940 devices?
The bq76940 devices are not designed with features for external stacking. The communication and data
transfer is mostly on I2C with a few other status and control signals needed, so interfacing to a host for
higher cell count may be possible, but no stacked application diagram is currently planned or available.
1.12 Why is the DEVICE_XREADY bit high on my part and it cannot be cleared?
For the bq76930 and bq76940 it typically indicates that the voltage on the bottom cell group is adequate,
but one of the upper cell groups’ supply voltage is below VSHUT. Raise all cell group supply voltages above
VPORA and clear the status bit. Another possibility is that the part has been damaged.
DEVICE_XREADY on the bq76920 typically indicates a malfunctioned part which may need replaced.
1.13 How can I tell if the voltage readings are correct or dormant values?
If the DEVICE_XREADY is set, the voltage register values from the device should not be used. If the user
would like a way to check if the part is alive, construct a circuit that can be controlled by the system
microcontroller, which would short the thermistor on an upper cell group. The microcontroller could then
observe the voltage change based on its control and know that the part was functioning. This could be
used even if the thermistors are not used by selecting the external temperature sensing for this test. Note
that the temperature selection change may take 2 seconds to update.
1.14 Will the bq769x0 share the bus with a bq34z100?
Yes, the default (-00) bq769x0 device address (7 bit) is 0x08 while the bq34z100 address is 0x55, so they
should share the bus without issue.
1.15 What is the ALERT pin timing?
The alert pin does not have noise discrimination. It is sampled at about 256 kHz. If it is sampled high, it
will be driven high approximately 3 clocks (12 μs) later. A pulldown resistor or capacitor may help avoid
false detection on the pin. The time constant on the pulldown should allow the pin to settle below the 1-V
threshold within approximately 250 μs to avoid the part from detecting the residual ALERT pin voltage
after a status register clear.

結果 (中文) 1:

1.11 For higher cell counts such as 20 cells, is there any recommendation on how tostack the bq76940 devices?The bq76940 devices are not designed with features for external stacking. The communication and datatransfer is mostly on I2C with a few other status and control signals needed, so interfacing to a host forhigher cell count may be possible, but no stacked application diagram is currently planned or available.1.12 Why is the DEVICE_XREADY bit high on my part and it cannot be cleared?For the bq76930 and bq76940 it typically indicates that the voltage on the bottom cell group is adequate,but one of the upper cell groups’ supply voltage is below VSHUT. Raise all cell group supply voltages aboveVPORA and clear the status bit. Another possibility is that the part has been damaged.DEVICE_XREADY on the bq76920 typically indicates a malfunctioned part which may need replaced.1.13 How can I tell if the voltage readings are correct or dormant values?If the DEVICE_XREADY is set, the voltage register values from the device should not be used. If the userwould like a way to check if the part is alive, construct a circuit that can be controlled by the systemmicrocontroller, which would short the thermistor on an upper cell group. The microcontroller could thenobserve the voltage change based on its control and know that the part was functioning. This could beused even if the thermistors are not used by selecting the external temperature sensing for this test. Note这温度选择更改可能需要 2 秒才能更新。1.14 将 bq769x0 与 bq34z100 共享总线?是的默认值 (-00) bq769x0 设备地址 (7 位) 是 0x08，而 bq34z100 地址是 0x55，所以他们应共享总线没有问题。1.15 什么是警报针计时?警报的 pin 不一定噪声歧视。它是在约 256 kHz 采样。如果它采样高，它将后驱动高大约 3 时钟 (12 μ s)。下拉电阻或电容可能有助于避免引脚上的虚假检测。在下拉列表上的时间常数应允许 pin 来解决以下 1-V在大约 250 微秒，以避免部分从检测残余提醒引脚电压阈值后状态登记清楚。

結果 (中文) 3:

1.11细胞计数较高如20细胞，有任何建议，如何
栈bq76940设备？
的bq76940装置不具有外部堆积特征。通信和数据传输是
I2C与其他几个状态和控制信号的需要，因此连接到主机
高细胞计数可能，但没有堆叠应用图目前计划或可用。
1.12为什么是device_xready我点高，它不能被清除？
为bq76930和bq76940这通常表明在底部的电池组的电压是足够的，但一个
上电池组电压低于vshut。提高电池组供电电压高于
vpora和清除状态位。另一种可能性是，部分已损坏。
在bq76920 device_xready通常表明出现故障，可能需要更换。
1.13我如何能告诉如果电压读数是正确的或潜伏的价值？
如果device_xready设置，从设备的电压寄存器值不应使用。如果用户的话，想办法检查零件是否还活着，构建一个可以控制的电路，该电路可以控制系统的微控制器，它将短热敏电阻的上电池组。然后，微控制器可以观察其控制的电压变化，并知道该部分的功能。这可能是
即使热敏电阻不是通过选择外部温度测试传感应用。注温度的选择改变，可能需要2秒来更新。
1.14将bq769x0分享一个bq34z100公共汽车？
是的，默认的（00）bq769x0设备地址（7位）是0x08而bq34z100地址0x55，所以他们
应共享总线没有问题。
1.15 ALERT引脚的时间是什么？该警告引脚没有噪声歧视。它被采样约256千赫。如果它被采样高，它将被驱动高约3个时钟（12μ秒）后。一个下拉电阻或电容器可能有助于避免
引脚上的错误检测。时间常数对下拉应允许引脚解决下面的V
阈值在约250μ的避免部分之后检测状态寄存器清除残余提醒引脚电压
。