JAJSH69D January 2018 – June 2022 TCAN4550-Q1
PRODUCTION DATA
There are internal pull-ups and pull-downs on critical terminals to place the device into known states if the terminal floats. See Table 8-5 for details on terminal bias conditions.
TERMINAL | PULL-UP or PULL-DOWN | COMMENT |
---|---|---|
SCLK | Pull-up | Weakly biases input |
SDI | Pull-up | Weakly biases input |
nCS | Pull-up | Weakly biases input so the device is not selected |
nWKRQ | Pull-up | Weakly biases output when using internal voltage rail. When using open-drain configuration, an external pull-up is needed. |
RST | Pull-down | Weakly biases RST terminal towards normal operation mode |
The internal bias should not be relied upon as only termination, especially in noisy environments but should be considered a failsafe protection. Special care needs to be taken when the device is used with MCUs utilizing open drain outputs.