UM10729
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© NXP Semiconductors B.V. 2017. All rights reserved.
User manual
Rev. 2 — 1 August 2017
10 of 24
NXP Semiconductors
UM10729
PCA9955A/B demonstration board OM13483
[1]
Default PCA9955A/B slave address is 0x02h (AD[2:0] = GND).
J12, J16,
J19, J22
(2-pin)
Short
These jumpers are used to open the WHT_LED1 or RGB_LED1 J12 to control White LED,
J16 to control Red LED, J19 to control Green LED, J22 to control Blue LED.
Open:
connected the current meter to measure one of the LEDs output current or open one
of the LEDs outputs for detecting an LED open condition in one of EFLAGn registers.
Short:
normal operation for WHT_LED1 and RGB_LED1.
J13
(3-pin)
1-2
(V
LED
= +3.3 V)
This jumper is used to select LED supply voltage.
1-2:
3.3 V for all LEDs supply voltage.
2-3:
5 V for all LEDs supply voltage.
Open (no jumper):
select external voltage from J20 (
+20 V) and J24 (GND)
J14, J18
(2-pin)
Open
These jumpers are used to merge the LED[0:2] outputs together for driving higher LED
current.
Open:
normal operation for the LED[0:2].
Short:
When short J14/J18 and open J16/J19 to combine LED[0:2] outputs to drive LED0.
When short J14 only and open J16 to combine LED[0:1] outputs to drive LED0.
J15, J17,
J21, J23
(2-pin)
Open
These jumpers are used to short the WHT_LED1 or RGB_LED1 J15 to control White LED,
J17 to control Red LED, J23 to control Green LED, J21 to control Blue LED.
Open:
normal operation for WHT_LED1 and RGB_LED1.
Short:
to short one of the LEDs output for detecting an LED short condition in one of
EFLAGn registers.
J20
(2-pin)
+20 V input
External
+20 V input for LEDs supply voltage. The J13 is
open
to supply this
+20 V
voltage to all LEDs.
J24
(2-pin)
GND
External GND input for LEDs supply voltage.
J25, J27,
J29, J31
(2-pin)
Short
These jumpers are used to open the WHT_LED4 or RGB_LED4.
J25 to control White LED, J27 to control Red LED, J29 to control Green LED, J31 to control
Blue LED.
Open:
connect current meter to measure one of the LEDs output current or open one of the
LEDs outputs for detecting an LED open condition in one of EFLAGn registers.
Short:
normal operation for WHT_LED4 and RGB_LED4.
J26, J28,
J30, J32
(2-pin)
Open
These jumpers are used to short the WHT_LED4 or RGB_LED4.
J26 to control White LED, J28 to control Red LED, J32 to control Green LED, J30 to control
Blue LED.
Open:
normal operation for WHT_LED4 and RGB_LED4.
Short:
to one of the LEDs for detecting an LED short condition in one of EFLAGn registers.
CON1
9-pin male
connector
This 9-pin connector is used to daisy-chain to next I
2
C-bus slave device or demo board.
CON2
9-pin female
connector
This 9-pin connector is used to connect to Fm+ I
2
C development board or I2C 2005-1
evaluation board as master device to drive this demo board.
CON3
5-pin male
connector
This 5-pin connector is used to connect to the PCU9669 or PCA9665 mini board as I
2
C-bus
master device to drive this demo board.
CON4
14-pin header
This 14-pin header is used to connect to Win-I2CUSB hardware board as I
2
C-bus master
device to drive this demo board.
TP1
Test Point 1
This TP1 is used to drive RESET input pin 25 from external when J6 is
open
.
TP2, TP3
Test Point 2/3
These two test points are GND for probe ground connection.
TP4
Test Point 4
This TP4 is used to drive OE input pin 5 from external when J11 is
open
.
Table 1.
Jumper settings for test and evaluation
…continued
Jumper
Default setting Comment