NXP Semiconductors PCA9617ADP-ARD User manual

UM11763
PCA9617ADP-ARD user manual
Rev. 1.0 — 22 July 2022 User manual
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Keywords PCA9617A, I2C-bus, level translator, repeater, Arduino port, EVK
Abstract The PCA9617ADP-ARD evaluation board is a daughterboard equipped with
an Arduino port, designated for easy testing and design of PCA9617A IC,
level translating FM+ I2C-bus repeater. The board is fully compliant with
IMXRT1050 EVK, LPCXpresso55S69 (LPC55S69-EVK) and i.MX 8M Mini
LPDDR4 EVK (8MMINILPD4-EVK, 8MMINID4-EVK), including GUI software
control. The board can be attached to any device equipped with an Arduino
port.

NXP Semiconductors UM11763
PCA9617ADP-ARD user manual
Rev Date Description
v.1.0 20220722 Initial version
Revision history
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IMPORTANT NOTICE
For engineering development or evaluation purposes only
NXP provides the product under the following conditions:
This evaluation kit is for use of ENGINEERING DEVELOPMENT OR
EVALUATION PURPOSES ONLY. It is provided as a sample IC pre-
soldered to a printed-circuit board to make it easier to access inputs,
outputs and supply terminals. This evaluation board may be used with any
development system or other source of I/O signals by connecting it to the
host MCU computer board via off-the-shelf cables. This evaluation board
is not a Reference Design and is not intended to represent a final design
recommendation for any particular application. Final device in an application
heavily depends on proper printed-circuit board layout and heat sinking
design as well as attention to supply filtering, transient suppression, and I/O
signal quality.
The product provided may not be complete in terms of required design,
marketing, and or manufacturing related protective considerations, including
product safety measures typically found in the end device incorporating the
product. Due to the open construction of the product, it is the responsibility of
the user to take all appropriate precautions for electric discharge. In order to
minimize risks associated with the customers’ applications, adequate design
and operating safeguards must be provided by the customer to minimize
inherent or procedural hazards. For any safety concerns, contact NXP sales
and technical support services.
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1 Introduction
This document describes the PCA9617ADP-ARD evaluation board. The evaluation board
is built around the PCA9617A, a level translating FM+ I2C-bus repeater, produced by
NXP Semiconductors. The evaluation board serves as a daughterboard that can be
connected through an Arduino port to various Arduino compatible (including original
Arduino Uno R3) EVK/motherboards with the purpose of testing and measuring the
characteristics of the PCA9617A Device Under Test (DUT).
The PCA9617ADP-ARD daughterboard tests and measures the static and dynamic
characteristics of the DUT by accessing an I2C EEPROM from the Arduino port through
the PCA9617A level translator.
The DUT is tested for different logic levels applied to both sides of the level translator, by
supplying the PCA9617A IC with two independent voltage programmable power supplies.
The power supplies are controlled by the motherboard (EVK) through the same Arduino
port. Power is delivered from the motherboard (EVK) through the Arduino port also.
Additionally, a GUI (Windows platform) is provided to facilitate the evaluation of the
daughterboard. The GUI is used with the following NXP evaluation boards: IMXRT1050
EVK Board, LPCXpresso55S69 Development Board, and i.MX 8M Mini LPDDR4 EVK
Board.
2 Finding kit resources and information on the NXP web site
NXP Semiconductors provides online resources for evaluation board and its supported
device(s) on http://www.nxp.com.
The information page for PCA9617ADP-ARD evaluation board is at http://http://
www.nxp.com/PCA9617ADP-ARD. The information page provides overview information,
documentation, software and tools, parametrics, ordering information and a Getting
Started tab. The Getting Started tab provides quick-reference information applicable
to using the PCA9617ADP-ARD evaluation board, including the downloadable assets
referenced in this document.
2.1 Collaborate in the NXP community
The NXP community is for sharing ideas and tips, ask and answer technical questions,
and receive input on just about any embedded design topic.
The NXP community is at http://community.nxp.com.
3 Getting ready
Working with the PCA9617ADP-ARD requires the kit contents, additional hardware, and
a Windows PC workstation with installed software.
3.1 Kit contents
•Assembled and tested evaluation board in an antistatic bag
•Quick Start Guide
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3.2 Assumptions
Familiarity with the I2C bus is helpful but not required.
3.3 Static handling requirements
CAUTION
This device is sensitive to ElectroStatic Discharge (ESD). Therefore care
should be taken during transport and handling. You must use a ground strap
or touch the PC case or other grounded source before unpacking or handling
the hardware.
3.4 Minimum system requirements
This evaluation board requires a Windows PC workstation. Meeting these minimum
specifications should produce great results when working with this evaluation board.
•Computer with Windows 10
•One USB port (either 3.0 or 2.0 or 1.1 compatible)
•One of three EVK boards (MIMXRT1050-EVK, LPC55S69-EVK, 8MMINILPD4-EVK)
along with the associated firmware/GUI software
•USB cable for power and data connection between PC and EVK board (if not included
in the EVK package)
4 Getting to know the hardware
4.1 PCA9617ADP-ARD features
•Equipped with I2C EEPROM for rapid test and measurements;
•Equipped with programmable power supplies for logic level combination;
•Onboard I2C-bus connector for easy access from external;
•Onboard jumpers for signal isolation of the DUT;
•Equipped with Arduino Uno R3 port for direct connection with Arduino devices;
•Fully compliant with IMXRT1050 EVK board, including GUI (Windows 10);
•Fully compliant with LPCXpresso55S69 dev. board, including GUI (Windows 10);
•Compliant with i.MX Mini LPDDR4 EVK board, including GUI (Windows 10).
Note: For i.MX Mini LPDDR4 EVK Board it is necessary to use an IMX8MMINI-IARD
interposer board between the EVK and PCA9617ADP-ARD daughterboard (see
IMX8MMINI-IARD User Manual).
4.2 Kit featured components
Figure 1 identifies the main components on the board. The PCA9617A (U6) is placed
in center of the board. In the right side, the user can find the EEPROM (U10) and the
hardware address jumpers (J11, J16, J17) of the DUT (U6). The output enable jumper
(J14) and I2C-bus external connector (J3) are in the bottom side. The programmable
power supplies (LOD 1, LDO 2), along with its additional components, are placed in the
top side of the PCB. Here, the user can find the power LEDs (D1-3.3 V, D2-5 V) and LDO
enable LED (D3).
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The Arduino port connectors (J1, J4, J5, J6) are located on the bottom side of the board.
Figure 1. The PCA9617ADP-ARD board picture, top view (up) and bottom view (down)
4.3 Schematic diagram
The schematic diagram of PCA9617ADP-ARD is available at: http://www.nxp.com/
PCA9617ADP-ARD/.
4.4 Arduino port
J1, J4, J5, and J6 are the mated pin headers of the Arduino Uno R3 connectors. The pins
have the same electrical function and are placed on the board so the daughterboard can
be directly inserted into the Arduino port.
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The daughterboard uses only eight signal lines. Table 1 shows the pin chart of
connectors, and the lines used in the circuit. See also the SPF-46669_A.pdf schematic
file.
Ref Des # Arduino label PCA9617ADP-ARD function
1 NC Not used
2 IOREF Not used
3 RESET Not used
4 3.3 V Not used
5 5 V Power supply
6 GND Power supply return
7 GND Power supply return
J6 (Power)
8 Vin Not used
1 A0 Not used
2 A1 Not used
3 A2 Not used
4 A3 Not used
5 A4/SDA I2C – SDA
J1 (analog, digital, I2C)
6 A5/SCL I2C – SCL
1 D0/RX DUT OE (output enable)
2 D1/TX MUX2_LDO2_S1
3 D2 MUX2_LDO2_S0
4 D3/PWM MUX1_EN_B
5 D4 MUX1_LDO1_S1
6 D5/PWM MUX1_LDO1_S0
7 D6/PWM Not used
J5 (digital, UART, PWM)
8 D7 Not used
1 D8 Not used
2 D9/PWM Not used
3 D10/SS/PWM Not used
4 D11/MOSI/PWM Not used
5 D12/MISO Not used
6 D13/SCK Not used
7 GND Power supply return
8 AREF Not used
9 A4/SDA Not used
J4 (mixed)
10 A5/SCL Not used
Table 1. Arduino connectors pin chart
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The circuit is supplied from the Arduino port through J6 and J4. Pin 4 of J6 is a 3.3
V power supply, while pin 5 of J6 is 5 V power supply. Pin 6 and 7 of J6 and pin
7 of J4 represents the power supply return (ground). LED D1 is the 3.3 V power
supply indicator (VCC_3V3_MAIN power net), and D2 is 5 V power supply indicator
(VCC_5V_MAIN power net). See the SPF-46669_A.pdf schematic file of PCA9617ADP-
ARD daughterboard.
4.5 I2C bus repeater/level translator
Figure 2 shows the I2C-bus repeater and EEPROM section of PCA9617ADP-ARD
schematic diagram. The I2C-bus of the Arduino port (A5 – SCL and A4 – SDA), controlled
by the EVK goes to side “B” of PCA9617A level translator/repeater (U7). U7 (the same
as the DUT) works as an interface between 3.3 V fixed voltage I2C-bus from the Arduino
port and variable voltage I2C-bus of the DUT. Side “A” of U7 is connected to side “A”
of the DUT (U6). The VCCA pins of both ICs are supplied by the LDO1 programmable
power supply (0.8 V to 4.96 V). From side “B” of the DUT (U6), the I2C-bus goes to the
EEPROM (U10). This section of the I2C-bus is also voltage variable; the VCCB pin of U6
and VCC pin of U10 are supplied from LDO2 programmable power supply (2.5 V to 4.96
V). In this way, the user can read/write data from/to EEPROM memory using a host (PC
and EVK) at different voltages across the DUT (PCA9617A level translator). Note that the
EEPROM can operate from 1.7 V to 5.5 V, which is fully compatible with the LDO2 output
voltage range. The jumper headers J15 and J18 allow isolation of the signal pins of the
DUT, so the user can access the level translator directly from outside of the board.
The output enable input of the DUT (pin 5, U6) can be controlled locally from jumper
header J14, or from EVK/GUI. When OE is remote, jumper J14 is placed in position 1-2,
and the OE is controlled through pin 1 of the Arduino connector J1. The OE input has an
internal pullup resistor connected to VCCB pin. Q1 assures the level translation from 3.3
V to VCCB rail voltage.
Jumpers J11, J16, and J17 set the hardware address of the EEPROM memory. The user
should set the I2C control byte accordingly with the hardware address of the EEPROM.
The I2C-bus from the Arduino port can also be accessed from the I2C-bus external
connector (J3). For details, see the SPF-46669_A.pdf schematic file.
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Figure 2. PCA9617ADP-ARD – I2C-bus repeater/level translator section
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4.6 Programmable power supplies
The PCA9617ADP-ARD contains two programmable power supplies: LDO1 and LDO2.
Figure 3 depicts the LDO sections of the schematic diagram. LDO1 provides the power
for VCCA, and LDO2 supplies VCCB power rail. Both regulators are controlled from the
EVK through the Arduino port.
4.6.1 LDO1
The programmable power supply LDO1 consists of an adjustable voltage regulator
LDK120M (U3), and the analog switch 74HCT4052D (U1). The analog switch selects the
resistor divider ratio in the feedback loop of the voltage regulator (U3). Table 2 shows
the output voltages of LDO1 as a function of switch position. U1 is controlled from the
Arduino port through “MUX1_LDO1_S0”, “MUX1_LDO1_S1”, “MUX1_EN_B” (pins 4, 5,
and 6 of the Arduino connector J5). The jumper header J19 allows the user to interrupt
the VCCA rail, to perform current measurements, or to supply VCCA from external.
MUX1_EN_B MUX1_LDO1_S1 MUX1_LDO1_S0 VCCA
High X (don’t care) X (don’t care) 0.8 V
Low Low Low 1.8 V
Low Low High 2.5 V
Low High Low 3.3 V
Low High High 4.96 V
Table 2. The VCCA programmable voltages
4.6.2 LDO2
The programmable power supply LDO2 is realized with the adjustable voltage regulator
MIC5301 (U4), and the analog switch 74HCT4052D (U2). Similarly, the analog switch
selects the resistor divider ratio in the feedback loop of the voltage regulator (U4). Table 3
shows the output voltages of LDO2 as a function of switch position. U1 is controlled from
the Arduino port through “MUX2_LDO2_S0” and “MUX2_LDO2_S1”, (pins 2 and 3 of the
Arduino connector J5). The control line “MUX2_EN_B” is connected to ground through
pulldown resistor R18. The jumper header J20 allows the user to interrupt the VCCB rail,
to perform current measurements, or to supply VCCB from external.
MUX2_LDO2_S1 MUX2_LDO2_S0 VCCB
Low Low 2.5 V
Low High 3 V
High Low 3.3 V
High High 4.96 V
Table 3. VCCB programmable voltages
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