PCF8563 Real-Time Clock (on the Seeed Expansion Board Base for XIAO)
The battery-backed clock built into the Seeed Expansion Board Base for XIAO. It keeps the date and time while the board is off.
No shop listed yet
Say it to PAL
“What time is it?”
The code PAL writes
const h = await p.read('seeed-xiao-expansion-rtc', 'hours');
const mins = await p.read('seeed-xiao-expansion-rtc', 'minutes');
p.log(`Time: ${h}:${String(mins).padStart(2, '0')}`);About it
An NXP PCF8563T real-time clock with a CR1220 backup cell, soldered onto the Seeed Studio Expansion Board Base for XIAO (103030356) and wired to the same I2C bus as its Grove I2C sockets. It is not sold on its own here: it comes with the base.
Where to buy
No shop listed yet.
Facts
Tested
It is in our catalog, but nobody has checked it on a real board. It may not work yet. Its driver is written, but it has not been tested on hardware yet.
I2C address
The PCF8563 Real-Time Clock (on the Seeed Expansion Board Base for XIAO) answers at I2C address 0x51. The address is fixed.
Free to reuse
Every fact here is open data under CC BY 4.0. Copy it into your own docs or code, and credit Palpable. Download it
This record was last changed on October 25, 2026.