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User manual Rev. 2 — 1 August 2017 13 of 24
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PCA9955A/B demonstration board OM13483
7. OM13483 demonstration board main components
8. PCA9955A/B evaluation steps
The PCA9955A/B is controlled by Win-I2CUSB GUI in Expert mode, as shown in
Figure 7 .
Connect the hardware as described in Section 4 . All jumpers are in default setting and
device address is set to 0x02 on J7, J9 and J10 (set AD[0:2] = GND) for PCA9955A/B
demo board. When you have correctly installed the software and the demonstration board
hardware is connected and recognized by the computer, start the Win-I2CUSB Lite
Table 2. OM13483 demo board main components
Device Description Address/LED Location
PCA9955BTW 16-channel Fm+ I
2
C-bus
57 mA / 20 V constant current
LED driver
0x02h for I
2
C demo board
(default setting)
U1
PRTR5V0U2AX ESD protection diode - U2
LW-E67C White LED 4 white LEDs WHT_LED[1:4]
LRTB_G6SG RGB LED 4 RGB LEDs RGB_LED[1:4]
LTST-C170GKT Green LED for PCA9955A/B
power supply either 3.3 V or
5 V indicator 1 green LED D1
Fig 7. Drop-down menu selection for Expert mode