NXP Semiconductors
UM11714
PCF85263ATL-ARD evaluation board
for monitoring purposes. The pin 4 of the DUT (TS/CLK/INTB) can be configured as
timestamp input, clock output or interrupt output pin. When is set as timestamp input,
an on-board switch (SW1) can be used for timestamp event generation. The TS/CLK/
INTB multipurpose pin is linked to J5, pin 4. The CLK output (pin 8) is linked to J36,
pin 1 through zero-ohm resistor R35. For more details see, the schematic diagram of
PCF85263ATL-ARD board (SPF-46659_A1.pdf).
The board is powered through the Arduino connector J6 (pin 4 – 3.3V, pin 6, 7 – GND).
The power is delivered to the DUT through J37 (located on the PCF85263ATL-ARD
board). The role of J37 is to allow the user to perform power-off tests and current
measurements. The board contains coin cell battery (BT1) for power backup and battery
switch-over test. The power from battery cell is delivered through J39. D1 is the power
indicator LED. The PCF85263A IC is driven by the 32.768 kHz crystal oscillator (Y1).
UM11714
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User manual
Rev. 1.0 — 17 February 2022
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