V1/Rst Connections (Uja1163A/64A/68Af/68Axf-Evb) - NXP Semiconductors UJA116 A Series User Manual

NXP Semiconductors

2.2.3 V1/RST connections (UJA1163A/64A/68AF/68AXF-EVB)

UM11379
User manual
The V1 supply voltage is generated by the internal 5 V regulator and is intended to
supply the external microcontroller. It also determines the IO reference level. RST is a
bidirectional signal between pin RSTN on the SBC and the MCU. It is used to initiate a
system reset.
A 10 kΩ pull-up resistor is connected between RSTN and V1 on the evaluation boards. A
reset can be triggered by a LOW level on RSTN. Detailed information on the functionality
and operation of the UJA1163A, UJA1164A and UJA1168AF/AXF can be found in the
data sheets and application hints (see
Table 5. V1/RSTN connections
UJA1163A, UJA1164A,
UJA1168A
RSTN (pin 5)
V1 (pin 3)
The V1 output and RST signals can be accessed from either J3 or J5. J3 is located on
the top of the evaluation board and J5 is mounted on the bottom. Decoupling capacitor
C8 is provided to stabilize output voltage on V1 and remove noise.
UJA1163A
UJA1164A
UJA1168A
Figure 4. V1 supply and RST connection options (only relevant for
UJA1163A/64A/68AF/68AXF-EVB)
All information provided in this document is subject to legal disclaimers.
Section
UJA1163A-EVB, UJA1164A-EVB, UJA1168AF-EVB,
UJA1168AXF-EVB
J3-09 or J5-05: connect MCU RST signal
J3-08 or J5-03: connect 5 V supply for the MCU
J3
RSTN(p5)
RST
V1(p3)
V1
C8
4.7 µF
GND(p2)
GND
Rev. 1 — 23 April 2021
UJA116xA evaluation boards
7).
R5
10 kΩ
R9
1 kΩ
D4
LED
UM11379
J5
R11
0 Ω RST
J7
V1
GND
aaa-040307
© NXP B.V. 2021. All rights reserved.
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