Optional components
Real Time Clock module
Iono RP D16 can be shipped with an optional, factory-installed hardware real time clock
with a dedicated long-life non-rechargeable back-up battery.
The battery is only used to power the RTC chip when the main power is not available.
Depending on operating conditions it should last up to two years if the Iono RP D16 board
is not powered, more if the Iono RP D16 receives external power.
The RTC module is based on the NXP Semiconductor PCF2131 real-time clock/calendar
chip. It is connected to the RP2040 via the I
2
C bus I2C0, GPIO0 (SDA) and GPIO1 (SCL),
address: 0x53.
Replacing the RTC backup battery
The Iono RP D16 RTC module uses a
CR1220
Lithium / Manganese Dioxide (Li/MnO2)
battery.
Improper handling of lithium batteries can result in an explosion of the batteries and/or
release of harmful substances.
Worn-out or defective batteries can compromise the function of this product.
KEEP OUT OF REACH OF CHILDREN
. Swallowing may lead to serious injury or death in
as little as 2 hours due to chemical burns and potential perforation of the esophagus.
Immediately see doctor.
Replace the RTC lithium battery before it is completely discharged. Replace the battery
every 5 years even if the battery is still working properly. The lithium battery must be
replaced only with an identical
CR1220
Lithium / Manganese Dioxide (Li/MnO2) battery.
Do not throw lithium batteries into fire, do not solder on the cell body, do not recharge, do
not open, do not short-circuit, do not reverse polarity, do not heat above 100°C and protect
from direct sunlight, moisture and condensation.
Dispose of used batteries according to local regulations and the battery manufacturer's
instructions.
The RTC backup battery holder is soldered to the bottom layer of the RTC module circuit
board. The battery is not accessible from the outside. You should first remove the case top
body, and separate the top and bottom Iono RP D16 circuit boards, to gain access to the
RTC backup battery.
WARNING
20
Iono RP D16 User Guide
