NXP Semiconductors
UM11623
PCA9959HN-ARD evaluation board
Ref Des
#
Arduino label
PCA9959HN-ARD function
1
A0
Not used
2
A1
Not used
3
A2
Not used
4
A3
Not used
5
A4 / SDA
Not used
J35 (analog, digital,
I
2
C)
6
A5 / SCL
Not used
1
D0 / RX
Not used
2
D1 / TX
Not used
3
D2
REXT SELECT (SW_EN)
4
D3 / PWM
Not used
5
D4
Not used
6
D5 / PWM
Not used
7
D6 / PWM
Not used
J5 (digital, UART,
PWM)
8
D7
Not used
1
D8
RESET (RESET_B_D8)
2
D9 / PWM
OUTPUT ENABLE (OE_B_D9)
3
D10 / SS / PWM
SPI – SELECT (SPI_C0_D10)
4
D11 / MOSI / PWM
SPI – MOSI (SPI_MOSI_D11)
5
D12 / MISO
SPI – MISO (SPI_MISO_D12)
6
D13 / SCK
SPI – CLOCK (SPI_CLK)
7
GND
Power supply return
8
AREF
Not used
9
A4 / SDA
Not used
J36 (mixed)
10
A5 / SCL
Not used
Table 2. Pin chart of Arduino connectors and their usage
...continued
[1]
A4 / SDA common line for J2 – 5 and J4 – 9. A5 / SCL common line for J2 – 6 and J4 – 10.
5.5 Fuji connectors
Fuji connectors J46 and J47 allow several PCA9959HN-ARD daughter boards to be
configured in a stack architecture. The connector J46 is the Fuji output pin header placed
on top of the layout. Fuji connector J46 is the pin receptacle located on the bottom of the
layout. When two boards are connected, J47 of the secondary board is inserted into Fuji
output connector (J46) of the primary (base) daughter board.
of Fuji connectors and the function of the pins.
J46 Fuji output connector (top)
J47 Fuji input connector (top)
1
3.3 V rail distribution
1
3.3 V rail distribution
2
5 V rail distribution
2
5.0 V rail distribution
3
Input control of switch U5
3
Connected to GND. Close the switch U5 of the previous
board.
4
I MAX (R EXT) control distribution
4
I MAX (R EXT) control distribution
5
RESET distribution
5
RESET distribution
Table 3. Pin chart of Fuji connectors and their functions
UM11623
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© NXP B.V. 2021. All rights reserved.
User manual
Rev. 1 — 21 May 2021
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