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PD720231
7.
How to Connect to External Elements
R19UH0094EJ0100 Rev 1.00
Page 24 of 30
Mar 1, 2013
7.
How to Connect to External Elements
7.1
Handling Unused Pins
Unused pins shall be connected as shown below.
Table 7-1. Unused Pin Connection
Pin Direction
Connection
Method
GPIO0/SPISO,
GPIO1/SPISCK,
GPIO2/SPISI,
GPIO3/SPICSB
I/O
Please refer to Table 5-1
GPIO4,
GPIO7/CLKOUT,
GPIO8, GPIO9/EXTINT
I/O Open
GPIO5, GPIO6/ACT
I/O
Pull-up or down on board.
If the USB to SATA bridge system needs only USB2.0 (High/Full-speed), but not USB3.0 (SuperSpeed),
unused pins related to SuperSpeed shall be handled as shown below.
Pin Direction
Connection
Method
U3RXP I
Open
U3RXN I
Open
U3TXP O
Open
U3TXN O
Open