ZHCSJU5B February 2019 – May 2021 CC3135
PRODUCTION DATA
All unused pin should be configured as stated in Table 7-3.
FUNCTION | SIGNAL DESCRIPTION | PIN NUMBER | ACCEPTABLE PRACTICE | PREFERRED PRACTICE |
---|---|---|---|---|
DIO | Digital input or output | Wake up I/O source should not be floating during hibernate. All the I/O pins will float while in Hibernate and Reset states. Ensure pullup and pulldown resistors are available on board to maintain the state of the I/O. Leave unused DIOs as NC | ||
No Connect | NC | 26 | Unused pin, leave as NC. | Unused pin, leave as NC |
SOP | Configuration sense-on-power | Ensure pulldown resistors are available on unused SOP pins | 69.8K Pull down resistor on SOP0 and SOP1 used as switch control pins, 100K pull down on SOP2 | |
Reset | RESET input for the device | Never leave the reset pin floating | ||
Clock | RTC_XTAL_N | When using an external oscillator, add a 100-kΩ pullup resistor to VIO | ||
WLAN_XTAL_N | When using an external oscillator, connect to ground if unused |