NXP Semiconductors PTN3222CUK-EVB, Руководство пользователя, Страница: 7 / 10

NXP Semiconductors
UM11806
PTN3222CUK-EVB demo board user manual
4.4 I
2
C host interface and 3V3 level shifter
J25 is the host I
2
C interface that allows the host to control PTN3222CUK via I
2
C bus.
There is an onboard level shifter to shift 3V3 I
2
C bus on the host side to 1V8 I
2
C
comparable level on the PTN3222CUK side. If the I
2
C voltage level on the host side is
from 1V2 to 1V8, then the onboard level shifter can be removed and bypassed with R48-
R51.
PTN3222CUK can be hardwired to one of four I
2
C target addresses: 0x43, 0x47, 0x4B
and 0x4F, and J26 is used for PTN3222CUK I
2
C target address selection. If the I
2
C
target address is selected after PTN3222CUK has been powered up, PTN3222CUK must
be power recycled or reset for the new I
2
C address to take effect.
Figure 5. I
2
C interface
4.5 Schematic, board layout and bill of materials
The schematic, board layout and bill of materials for the PTN3222CUK-EVB evaluation
board are available at http://www.nxp.com/PTN3222CUK .
5 Board Layout
The layout of this board follows the general layout guidelines in AN13462
[1]
. This is a
separate application note and should be used as reference and guidelines to layout PCB
traces, design PCB trace impedance, placing of decoupling capacitors, etc.
6 Abbreviations
Acronym Description
IC integrated circuit
MCU microcontroller unit
PCB printed-circuit board
SMP switch mode power supply
USB universal serial bus
7 References
[1] PTN3222 layout guidelines —PTN3222 is a 1-port eUSB2 to USB2 redriver IC that performs translation between
eUSB2 and USB2 signaling schemes. https://www.nxp.com/docs/en/application-note/AN13462.pdf
UM11806 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2022. All rights reserved.
User manual Rev. 1 — 25 May 2022
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