User Manual
ATZB-S1-256-3-0-C ZigBit 2.4GHz Single chip Wireless Module [DATASHEET]
42191AWIRELESS10/2013
13
NOTE: TXD, RXD of UART are crossed inside ZigBit Module. External UART devices connecting to ZigBit Module
should follow straight connection for UART:
UART_TXD_external_device <-> UART_TXD
UART_RXD_external_device <-> UART_RXD
3.4 Mounting Information
The Figure below shows the PCB layout recommended for a ZigBit module. Neither via-holes nor wires are allowed on
the PCB upper layer in the area occupied by the module. As a critical requirement, RF_GND pins should be grounded
via several via-holes to be located right next to the pins thus minimizing inductance and preventing both mismatch and
losses.
Figure 3-1. ATZB-S1-256-3-0-C Dimensions