ATWILC3000 Pin Review


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ATWILC3000-MR110CA Part Review

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Date: 2026-07-23 Official Microchip datasheet used for review: ATWILC3000 Wi-Fi® Link Controller Module Data Sheet, DS70005327
Completed the ATWILC3000-MR110CA datasheet review and grouped every pin into one primary function with no duplicated physical pins. I also populated pin descriptions/types and created the detailed report here: ATWILC3000-MR110CA Part Review.
Open items:
  • Pin 34/35 labels appear swapped versus the Microchip datasheet: pin 34 should be GPIO21, pin 35 should be GPIO0.
  • Pin 37 is electrically correct as ground, but naming it PADDLE / PADDLE/VSS would better match the datasheet.
  • The stored datasheet URL is readable but appears to use HTTP; the HTTPS Microchip URL is preferable.
Suggested next steps:
  1. Rename/swap the pin 34 and pin 35 terminal labels.
  2. Rename pin 37 to make the exposed paddle explicit.
  3. Normalize pin 23 naming to SD_CMD/SPI_SCK.
  • Make the functional group more general.
  • Add a Section property to all pins, and apply the same value used in the Pin Group property to each pin's Section property.
Assign a Terminal Order from 1 to 10, starting with Power. Power should be Terminal Order 1, and Ground should be last, Terminal Order 10. For Orientation, set Power to "Top" and Ground to "Bottom." For the remaining sections/groups, you may decide the Terminal Order and Orientation yourself. For Orientation, distribute them between "Left" and "Right" — don't put everything on one side. Each group/section should have a different orientation.
I’ll generalize the pin groups, mirror each group into Section, and rebalance Terminal Order/Orientation with Power at top/order 1 and Ground bottom/order 10.
Updated all pins as requested.
Open items:
  • None for this grouping pass.
  • Existing pin-description note remains: pin 34/35 labels still appear swapped versus the datasheet, but I did not rename pins because this request was only for grouping/section/order/orientation.
Suggested next steps:
  1. Rename/swap pin 34 and pin 35 labels to match the datasheet.
  2. Rename pin 37 to PADDLE or PADDLE/VSS.
  3. Review the generated symbol visually and adjust left/right balance if you want a different layout.
Fix pin labels
Swap GPIO labels
Rename paddle pin
Normalize SD pin
Review symbol layout

SDIO/SPI_CFG
Pin Number
2
GND_1
Pin Number
1
N/C_2
Pin Number
4
N/C_1
Pin Number
3
Name
Pin #
Type
Section
Pin Group
Orientation
Order
Sub-symbol
GND_1
1
Ground
Ground
Ground
Bottom
10
SDIO/SPI_CFG
2
Input
Control
Control
Left
2
N/C_1
3
Not Connected
NC
NC
Left
9
N/C_2
4
Not Connected
NC
NC
Left
9
N/C_3
5
Not Connected
NC
NC
Left
9
N/C_4
6
Not Connected
NC
NC
Left
9
RESETN
7
Input
Control
Control
Left
2
BT_TXD
8
Bi-Directional
UART
UART
Left
4
BT_RXD
9
Bi-Directional
UART
UART
Left
4
BT_RTS/I2C_SDA_S
10
Bi-Directional
UART
UART
Left
4
BT_CTS/I2C_SCL_S
11
Bi-Directional
UART
UART
Left
4
VDDIO
12
Power In
Power
Power
Top
1
GND_2
13
Ground
Ground
Ground
Bottom
10
GPIO3
14
Bi-Directional
GPIO
GPIO
Right
6
GPIO4
15
Bi-Directional
GPIO
GPIO
Right
6
UART_TXD
16
Bi-Directional
UART
UART
Left
4
UART_RXD
17
Bi-Directional
UART
UART
Left
4
VBAT
18
Power In
Power
Power
Top
1
CHIP_EN
19
Input
Control
Control
Left
2
RTC_CLK
20
Bi-Directional
Clock
Clock
Right
3
GND_3
21
Ground
Ground
Ground
Bottom
10
SD_CLK/GPIO8
22
Bi-Directional
Interface
Interface
Right
5
SD_CMD_SPI_SCK
23
Bi-Directional
Interface
Interface
Right
5

ATWILC3000-MR110CA