Data Sheet

SPNYL01-X Bluetooth module datasheet
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7. PCB Design Guide
7.1 Layout notes
You can refer to the following references for the mounting design of the module with on-board
antenna (SPNYL01-P with PCB antenna).
For external antenna modules (SP01L-E needs to connect an external antenna to the u.FL connector),
you need to refer to the external antenna design requirements.
Recommended module mounting example:
Please do not place any metal components in blue shaded space (*1), such as signal line and
metal chassis as possible except for main board while mounting the components in *1 space
on the main board is allowed except for no copper plating area (*2).
• (*2) This area is routing prohibited area on the main board. Please do not place copper on any
layer.
• (*3) Characteristics may deteriorate when GND pattern length is less than 30mm. It should be 30
mm or more as possible.
• For the best Bluetooth range performance, the antenna area of module shall extend 3 mm
outside the edge of main board, or 3 mm outside the edge of a ground plane. Ground plane
shall be at least 5 mm from the edge of the antenna area of module.
• All module GND pins MUST be connected to main board GND. Place GND vias close to module GND
pads as possible. Unused PCB area on surface layer can flooded with copper but place GND vias
regularly to connect copper flood to inner GND plane. If GND flood copper underside the module
then connects with GND vias to inner GND plane.
• Even when above mentioned condition is satisfied, communication performance may be
significantly deteriorated depending on the structure of the product. Bluetooth range
performance is degraded if a module is placed in the middle of the main board.
• For main board layout:
• Avoid running any signal line below module whenever possible.