NXP Semiconductors PCA9955BTW-ARD, Руководство пользователя, Страница: 11 / 38

NXP Semiconductors
UM11761
PCA9955BTW-ARD evaluation board
Figure 3. PCA9955BTW-ARD chain configuration
Signal line CHAIN – LEFT (J45) pin no. CHAIN – RIGHT (J89) pin no.
SDA 7 4
SCL 9 2
OE 3 8
RESET 1 10
MUX (REXT) 5 6
VCC_5V0 2, 4 7, 9
GND 6, 8, 10 1, 3, 5
Table 3. The expansion connector J45 / J89 pin chart
4.8 Jumpers and test points
The board contains 25 jumpers and 22 test points. Table 4 and Figure 4 details the
jumper locations and their default configurations. Table 5 describes the test points
located on the PCA9955BTW-ARD board.
Ref Des Default Description
1-2: Imax - REMOTE
2-3: Imax - 20 mA
J91 1-2
OFF: Imax - 50 mA
1-2: Power from ARDUINO
J84 1-2
2-3: External POWER
J86
J87
J88 1-2
1-2
1-2
1-2/1-2/1-2: I
2
C Address = BCh (Hex)
For more details about I
2
C address see Table 1
ON: D4 – ON (LED D4 connected to driver)
J65 ON
OFF: D4 – OFF (LED D4 disconnected from driver)
ON: D5 – ON (LED D5 connected to driver)
J66 ON
OFF: D5 – OFF (LED D5 disconnected from driver)
ON: D6 – ON (LED D6 connected to driver)
J67 ON
OFF: D6 – OFF (LED D6 disconnected from driver)
J68 ON ON: D7 – ON (LED D7 connected to driver)
Table 4. PCA9955BTW-ARD jumpers
UM11761 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2022. All rights reserved.
User manual Rev. 1.0 — 18 March 2022
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