TUYA WBR3L - 7 Power-On Sequence and Resetting; Power-On Sequence; Resetting

7 POWER-ON SEQUENCE AND RESETTING
7 Power-on Sequence and Resetting
7.1 Power-on Sequence
The RTL8720CF chip has requirements on the power-on sequence. It is recom-
mended that the voltage rise from 0 to 3.3V within 40mS.
Symbol Parameter
Minimum
Value
Typical
Value
Maximum
Value Unit
TPRDY 3.3V ready
time
0.6 20 mS
CHIP_EN CHIP_EN
ready time
0.6 20 mS
7.2 Resetting
When designing a plate of a module, you should set a reset IC at the foot of CHIP_EN
in advance. The preferable type of IC is BL8506-27CRO. The module is packaged in
the form of SOT23. For solutions to starting a module in some cases, refer to the
circuit in the following figure (R30 is preset and cannot be placed).
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