NXP Semiconductors UJA116 A Series, Руководство пользователя, Страница: 7 / 56

NXP Semiconductors
UM11379
UJA116xA evaluation boards
2.2.2 VIO/VBUF connections (UJA1161A/62A-EVB)
A V
IO
supply is needed for the digital IOs. The V
IO
voltage must be aligned with the MCU
interface supply voltage. V
IO
is not needed in Sleep mode.
The BUF voltage is generated automatically by the internal voltage source when needed
for CAN bus communication. Detailed information on the functionality and operation of
the UJA1161A and UJA1162A can be found in the data sheets and application hints (see
Section 7 ).
UJA1161A, UJA1162A UJA1161A-EVB, UJA1162A-EVB
VIO (pin 5) J3-09 or J5-03: connect MCU-compatible supply voltage
BUF (pin 3) J3-08: no external supply needed; generated by the device when
needed for CAN bus communication
Table 4. VIO/BUF connections
The VIO supply can be connected to either J3 or J5. The BUF signal is available on J3.
J3 is located on the top of the evaluation board and J5 is mounted on the bottom. The J5
connector pin arrangement follows the Arduino Uno pinout order, allowing the UJA1161A-
EVB and UJA1162A-EVB to be connected directly to a variety of NXP MCU evaluation
boards. Decoupling capacitors C3 and C8 are provided to stabilize the voltages on VIO
and BUF and to remove noise.
VIO(p5)
BUF(p3)
GND(p2)
C8
4.7 µF
J3 J5
aaa-040306
UJA1161A
UJA1162A
C3
10 nF
R10
0 Ω
VIO
VIO
GND
BUF
GND
Figure 3. VIO/BUF supply connection options (relevant for UJA1161A/62A only)
UM11379 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2021. All rights reserved.
User manual Rev. 1 — 23 April 2021
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