Data Sheet

SWA54 Module Datasheet Rev 1.2
7
18 GPIO22/D+
Digital
I/O
47 or 43
GPIO or USB
Data Plus
(2
)
GPIO or USB
Data Plus
(2
)
19 GPIO23/D-
Digital
I/O
46 or 42
GPIO or USB
Data Minus
(2
)
GPIO or USB
Data Minus
(2
)
20 GPIO24
Digital
I/O
41
GPIO
(3
)
GPIO
(3
)
21 RESETN_EXT
Digital
Input
37
RESET signal
active low
(4
)
RESET signal
active low
(4
)
22 GND GND Paddle (57) GND GND
23 VDD
Supply
Input
31, 45, 54
+5.0V input
supply voltage
+5.0V input
supply voltage
24 VDD
Supply
Input
31, 45, 54
+5.0V input
supply voltage
+5.0V input
supply voltage
Notes:
(1) Pin 17 is hardware configured as GPIO15/ADAT2 by default; utilizing this pin as a CEN requires a
different stuffing option.
(2) Utilizing pins 18 and 19 as USB D+ and D- requires the firmware to Tri-state GPIOs 22 and 23.
(3) Pin 20 (GPIO24) can be utilized to implement a “Data Waiting” interrupt signal for I2C and SPI Slave
data communication.
(4) Pin 21 (RESET_EXT) can be pulled to GND with a switch or an open drain/collector type device to
provide a hard reset signal to the SKY76303-21. This pin is pulled up to VDDIO (3.3V) internally in
the SKY76303-21 and should not be actively driven high.