UC-00-M24 EN R2
Hardware Design
7
The module reset pin RST is for quick reset. Please connect it correctly to ensure
the module can be reset reliably
To achieve good performance, special attention shall be paid to the following items in the
design:
Power supply: good performance requires stable and low-ripple power supply.
The ripple voltage peak shall not exceed 50mVpp. In addition to LDO, to
guarantee the pure power supply, the following shall also be considered:
–
Widen the power layout or split the copper surface to transmit the current
–
Place LDO as close as possible to the module
–
The power layout shall bypass the high-power and high-impedance
devices, such as magnetic coil
Interface: ensure that the signals and baud rate of the main equipment are
consistent with that of UT4B0
Avoid wiring below UT4B0
Try to keep the module away from the high temperature gas flow
3.2
Module Reset Signal
UT4B0 needs to be reset correctly before it can work normally when it is powered on. To
ensure effective reset, the reset pin RST of the module and the power supply VCC shall
meet the following timing requirements when powered on. Pulling down the RST pin for
over 5ms during normal operation of the module can also reset UT4B0.
Figure 3- 1 UT4B0 Module Reset Signal
3.3
Antenna
The antenna input signal pin ANT_IN of UT4B0 module pr3.3~5.0V antenna
feed externally. When +3.3~5.0V active antenna is used in UT4B0 module, attention
Over
5ms
