NXP Semiconductors
UM11714
PCF85263ATL-ARD evaluation board
Ref Des
#
Arduino label
PCF85263ATL-ARD function
10 A5 / SCL
Not used
Table 1. Pin chart of Arduino connectors and their usage
...continued
The circuit is supplied with 3.3 V from Arduino port through J6 and J36. Pin no. 4 of J6
is 3.3 V power supply, while pin no. 6, 7 of J6, and pin no. 7 of J36 represents the power
supply return (ground).
4.5 I2C external connector (J38)
The I
2
C-bus of the PCF85263A can be directly accessed from external through the
connector J38, located on the PCF85263ATL-ARD daughterboard.
pin chart of J38.
J38 pin no.
Function
Comment
1
VCC_3V3
Power supply (3.3 V)
2
I2C_3V3_SDA
I
2
C-bus data (SDA)
3
I2C_3V3_SCL
I
2
C-bus clock (SCL)
4
GND
Power supply return (ground)
Table 2. J38 pin chart
4.6 Jumpers and test points
The board contains two jumpers and several test points.
detail
the jumper locations and their default configurations.
located on the PCF85263ATL-ARD board.
Ref Des
Label
Default
Description
ON: Enable the interrupt monitor LED (D2)
J24
INT MONITOR ON / OFF
ON
OFF: Disable the interrupt monitor LED (D2)
ON: PCF85263A (U1) VDD power-on
J37
RTC VDD ON / OFF
ON
OFF: PCF85263A (U1) VDD power-off
ON: PCF85263A (U1) VBAT power-on
J39
RTC VBAT ON/OFF
ON
OFF: PCF85263A (U1) VBAT power-off
Table 3. PCF85263ATL-ARD jumpers
UM11714
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User manual
Rev. 1.0 — 17 February 2022
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