Part Datasheet Review and Validation

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Azoteq IQS572BLQNR is a ProxSense® 72-channel projected capacitive touch/proximity trackpad and touchscreen controller with I²C interface, 1.65–3.6 V supply, and 28-QFN 4×4 mm package.
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IQS572BLQNR library symbol has incorrect/malformed pin names: pin 19 appears as duplicate TX0 but official datasheet says TX1; pin 22 appears as TX84 but official datasheet says TX4. Also datasheet URL is wrong (MCP23018).
Flux library part IQS572BLQNR has Datasheet URL pointing to Microchip MCP23018 datasheet instead of Azoteq IQS572/IQS5xx. This prevents datasheet query from returning correct pinout/application data.
check and correct if necessary according to the datasheet

flux

I’ll verify the official Azoteq datasheet, inspect pins 19 and 22 plus the current Datasheet URL, correct confirmed errors, and re-check the part.

flux

The official IQS572 QFN28 table confirms pin 19 = TX1 and pin 22 = TX4. I also found the project’s attached datasheet is not being used correctly, so I’m replacing it with the official Azoteq PDF.

flux

Corrected against the official Azoteq IQS572 QFN28 pinout:
  • Pin 19: duplicate TX0 → TX1
  • Pin 22: malformed TX84 → TX4
  • Datasheet URL: replaced MCP23018 link with the official Azoteq IQS5xx-B000 datasheet
Re-inspection confirms the corrected pin numbers and names. I also filed a library-quality report with Flux engineering.
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Files

Pins

Symbol

Layout

3D View

TX4
Pin Number
22
RX0
Pin Number
10
SCL
Pin Number
3
VDDHI
Pin Number
4
TX5
Pin Number
23
RX1
Pin Number
11
SW_IN
Pin Number
28
TX6
Pin Number
24
TX8
Pin Number
26
VREG
Pin Number
6
VSS
Pin Number
5
n/c
Pin Number
1
RX2 / TX14
Pin Number
12
PGM
Pin Number
27
RX5 / TX11
Pin Number
15
RDY
Pin Number
8
TX0
Pin Number
18
RX7 / TX9
Pin Number
17
SDA
Pin Number
2
TX2
Pin Number
20
RX3 / TX13
Pin Number
13
NRST
Pin Number
7
RX6 / TX10
Pin Number
16
RX4 / TX12
Pin Number
14
n/c
Pin Number
9
TX7
Pin Number
25
TX3
Pin Number
21
Name
Pin #
Type
Section
Pin Group
Orientation
Order
Sub-symbol
Functional Group
n/c
1
Bi-Directional
Left
SDA
2
Bi-Directional
Left
SCL
3
Bi-Directional
Left
VDDHI
4
Bi-Directional
Left
VSS
5
Bi-Directional
Left
VREG
6
Bi-Directional
Left
NRST
7
Bi-Directional
Left
RDY
8
Power In
Bottom
n/c
9
Input
Bottom
RX0
10
Input
Bottom
RX1
11
Input
Bottom
RX2 / TX14
12
Output
Bottom
RX3 / TX13
13
Input
Bottom
RX4 / TX12
14
Output
Bottom
RX5 / TX11
15
Bi-Directional
Right
RX6 / TX10
16
Bi-Directional
Right
RX7 / TX9
17
Bi-Directional
Right
TX0
18
Bi-Directional
Right
TX1
19
Bi-Directional
Right
Pins
TX2
20
Bi-Directional
Right
TX3
21
Bi-Directional
Right
TX4
22
Bi-Directional
Top
TX5
23
Power In
Top

IQS572BLQNR