NXP Semiconductors
IMXRT500HDG
i.MX RT500 Hardware Design Guide
Due to the removal of 3.3 V support on the high-speed pads, the SD card interface is no
longer supported. This considerably reduced the current leakage on
VDD1V8
. An erratum
is issued to describe this further describe. We are evaluating the use of using an external
level shifter to enable this.
Note:
The SDIO and MMC devices are unaffected.
7.19 i.MX RT500 power domains
Here are some comments and cautions regarding jumpers on the evaluation board.
Jumpers and 0 ohm resistors are used on the EVK to enable current measurements for
various hardware and software configurations.
These must not be used in an end application because they require additional
components and routing. Additional trace length is needed to place the jumper/resistor
further from the target, it adds inductance to the power domain. Jumpers are tall
structures that can radiate or couple external noises. This contributes to EMC emissions
and susceptibility.
Note:
The evaluation boards are typically tested to Class A emissions levels which are
looser than the Class B emissions levels for consumer goods.
CAUTION:
If jumpers or 0 Ω resistors are used for multi-pin supplies, a bulk capacitor
should be placed close to the jumper on the MCU side. This ensures the minimum bulk
capacitance when the jumper or resistor is removed, and an external supply is attached
to the node.
are for convenient attachment to an ammeter and
have bulk capacitance on the MCU side. The 40 ohm resistors can be replaced with low-
value resistors to perform differential voltage measurements to calculate the current.
Note:
These do not require bulk capacitance on the MCU side since the decoupling
caps are located close to the MCU.
R165
0
R166
0
R182
0
R480
0
D4
VDD_AO1V8_1
_MCU_AO1V8
B2
VDD_AO1V8_2
J14
LDO
LDO_ENABLE
VDD1V8_A
H6
VDD1V8_B
H7
VDD1V8_C
J7
VDD1V8_D
G6
VDD1V8_E
M6
E6
VDD1V8_F
VDD1V8_G
U32A
E8
VDD1V8_1
_MCU_VDD1V8_1
_MCU_VDD1V8
H13
VDDA_ADC1V8
_MCU_VDDA_ADC1V8
F12
VREFP
_MCU_VREFP
F8
MIPI_DSI_VDD18
_MCU_DSI_VDD18
G9
VDDCORE_1
H10
VDDCORE_2
H8
VDDCORE_3
H9
VDDCORE_4
J10
VDDCORE_5
J11
J9
VDDCORE_6
VDDCORE_7
K10 VDDCORE_8
K8
VDDCORE_9
K9
VDDCORE_10
L9 VDDCORE_11
J8
mipi core
MIPI_DSI_VDD11
F5
MIPI_DSI_VDDA_CAP
_MIPI_VDDA_CAP
OUT
LDO
Tie directly to
VDDCORE
C189
0.22
F
10 V
C229
0.22
F
10 V
C222
0.22
F
10 V
C225
0.22
F
10 V
C162
0.22
F
10 V
C328
1.0
F
10 V
C168
10
F
10 V
C169
0.22
F
10 V
C170
0.22
F
10 V
C171
0.22
F
10 V
C172
0.22
F
10 V
C364
0.22
F
10 V
C190
0.22
F
10 V
C329
1.0
F
10 V
C185
0.22
F
10 V
MCU_1V8
MCU_1V8
2
1
HDR 1x2
JS30
Put C328 near JS30
JUMPER (DEFAULT) = 1-2
JUMPER (DEFAULT) = 1-2
_MCU_VDDCORE
C174
0.22
F
10 V
C175
0.22
F
10 V
C176
0.22
F
10 V
C177
0.22
F
10 V
C178
0.22
F
10 V
C184
10
F
10 V
C368
1.0
F
10 V
1. 0 V by default
PMIC_SW1_OUT
2
1
HDR 1x2
JS25
Put C368 near JS25
JUMPER (DEFAULT) = 1-2
PMIC_LDO1_OUT
1
2
HDR 1x2
JS29
Put C329 near JS29
Jumpers and 0
esistors are used on the EVK to enable current
measurements.
These should not be used in an end application because they require
additional components and routing, which contribute to EMC
emissions and susceptibility.
If jumpers or 0
esistors are used for multi-pin supplies, a bulk
capacitor should be placed close to the jumper on the MCU side.
Figure 33. Evaluation board, schematic
Similar comments as before for the jumpers and 0 Ω resistors used for these power
domains. In all cases, a bulk capacitor is placed on the MCU side of the jumper on
supplies that have multiple pins.
IMXRT500HDG
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© 2022 NXP B.V. All rights reserved.
User guide
Rev. 0 — 15 November 2022
42 / 48
