nanoSSD Design Manual
19
Rev. 1. 5
MAR, 2016
3.2 GPIO table with function description
Item
Function
pin type
Description
GPIO0
Thermal Sensor SDA
output
For I2C interface thermal sensor IC
GPIO1
Thermal Sensor SCL
output
For I2C interface thermal sensor IC
GPIO2
UART-RX
input
UART message for debugging
GPIO3
UART-TX
output
UART message for debugging
GPIO4
Reserved
input
No function
GPIO5
Loader Mode
input
Strapping input type when power on,
Set it in high for entering loader mode, default is low.
GPIO6
NAND type0
input
for internal NAND flash type, leave it N.C.
GPIO7
NAND type1
input
for internal NAND flash type, leave it N.C.
GPIO8
Reserved
input
No function.
GPIO9
Reserved
input
For internal frequency type setting, leave it N.C.
GPIO10
Reserved
input
For internal frequency type setting, leave it N.C.
GPIO11
Reserved
input
For internal frequency type setting, leave it N.C.
GPIO12
Reserved
input
No function.
GPIO13
PHY LED
output
When SATA connected, it will output high for lighting LED.
GPIO14
DAS LED
output
When SSD is transferred data, it will output high and low for indicating
data access.
GPIO15
FW_WP
input
Low active,
it will be entering firmware write protection function if pull low
GPIO16
Reserved
input
no function
GPIO17
PWR loss
input
Low active, it will running internal cache data protect function when it
triggered.
Table 4 nanoSSD GPIO table
