NXP Semiconductors
S32K3X4EVB-Q172 HWUM
S32K3X4EVB-Q172 | S32K3X4EVB-S172 - Hardware User Manual
S32K344EVB-Q172 | -S172 HWUM
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NXP Semiconductors
REV A
– 10/2021
Page
10
of
31
7.1.1 S32K3X4EVB-Q172 | -S172
– FS26/Modes Operation
Figure 5. S32K3X4EVB-Q172 | -S172
– FS26/Modes Operation
Table 3. S32K3X4EVB-Q172 | -S172
– FS26/Modes Operation
Reference
Jumper Position
Description
Comments
Flash Mode
[Default
configuration]
J1
1-2
The R1961 resistor to VBATP (VBAT pro12.0V) is routed
as pull-up to the VDEBUG Pin. This is a common pull-up resistor
for the 2 voltage divider configurations, with R1971 or R1963.
J5
1-2
The R1963 is selected for the divider voltage, +8.0V is applied on
VDEBUG pin to set the FS26-SBC on MCU Flash Mode. In this
mode device power up sequence starts with debug mode
enabled and can be used during customer production process to
flash MCU without need of WD refresh. After ~80ms once the
SW1 is in ON-position the VDEBUG pin will be switching to a low
voltage (GND) due to the RC delay circuitry and Q18
Debug
Mode
J1
1-2
The R1961 resistor to VBATP (VBAT pro12.0V) is routed
as pull-up to the VDEBUG Pin. This is a common pull-up resistor
for the 2 voltage divider configurations, with R1971 or R1963.
J5
2-3
The R1963 is selected for the divider voltage, +5.0V is applied on
VDEBUG pin to set the FS26-SBC on Debug Mode, voltage must
be removed from debug pin in order to start power up sequence.
In this mode Watchdog refresh is not needed. After ~80ms once
the SW1 is in ON-position the VDEBUG pin will be switching to a
low voltage (GND) due to the RC delay circuitry and Q18.
R13
33K
FS26_VDEBUG
R32
5.1K
R65
100k
C3
10uF
25V
VBATP_SW
C81
0.22UF
0402
35V
R2
10K
R7
0
0402
D16
MMSZ8V2T1G
A
C
R297
33K
J5
HDR 1X3
SILK = VDBG_MODE
JUMPER(Default) = 1-2
1
2
3
Q1
BC846B
2
3
1
GND
VBATP
FS26_VDEBUG
Page[3]
R6
15K
J1
HDR1X2
SILK = VDBG_RMODE
JUMPER(Default) = 1-2
1
2