NXP Semiconductors
UM11099
PCAL6534 demonstration board OM13541
UM11099
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User manual
Rev. 1.0 — 1 August 2019
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3 Hardware description
3.1 Power supply jumpers
The power supply selection for the OM13541 is very flexible and allows for detailed
analysis and evaluation of 34-bit GPIO device. J13 s5V_PWR supply from either
the tester connector J1 (pins 4 and 6, +5V_TSTR) or the Fm+ board connector J11 (pins
7 and 12, +5V). J7 selects VDDP (U1 pin A6) supply from 5V_PWR or +3V3 (J11
pins 8 and 11) and J2 selects VDDI (U1 pin A1) supply from 3V3 (J11 pins 8
and 11) or +5V_PWR. If external power operation is desired from TP2 (VDDP-IN) and
TP3 (VDDI), no jumper is required on J7 and J2. The D2 green LED is lit when VDDP is
available.
3.2 SCL and SDA jumpers
The I
2
C -bus signals SDA and SCL supplied to the device under test can be sourced
from either the Fm+ board via J11 or the tester via J1. Jumpers J10 and J9 select the I
2
C
bus 1 or bus 2 signals from the Fm+ board, shorting pins 1 to 2 to select I
2
C bus 1 while
shorting pins 2 to 3 to select I
2
C bus 2.
3.3 Device reset, interrupt and address pin selection
• Reset
(U1, pin A5), the device is resetting when shorting pin 1 to 2 on jumper J5
• Interrupt
(U1, pin B1), open-drain interrupt (INT) output is activated and D1 red LED is
lit when any input state differs from its corresponding Input Port register state, TP4 can
be used to monitor the INT pin 32.
• Address input
(U1, pin A4), jumper J8 is used to select device address as shorting
pins 1 to 2 (VDD, address is 46h), shorting pins 3 to 4 (VSS, address is 44h), shorting
pins 5 to 6 (SDA, address is 42h), shorting pins 7 to 8 (SCL, address is 40h).
3.4 Board layout viewer
shows all jumper locations and labels on PCB.
Figure 1. PCAL6534 demo board layout and Labels