SLLSEZ4A August 2019 – November 2019 TCAN4551-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 4 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 be needed. |
RST | Pull down | Weakly biases RST terminal towards normal operation mode |
NOTE
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.