24
Chapter 2
HARDWARE INSTALLATION
User's Manual |
CS551
X
Internal I/O Connectors
SMBus
The SMBus (System Management Bus) connector is used to connect the SMBus device. It is a
multiple device bus that allows multiple chips to connect to the same bus and enable each one
to act as a master by initiating data transfer.
SMBus Pin Assignment
Pin Assignment
Pin Assignment
1
3V3SB
2
GND
3
SMBus_Clock
4
SMBus_DATA
5
SMBus_Alert
6
---
Pin Assignment
Pin Assignment
1
DIO_6
2
DIO_7
3
DIO_4
4
DIO_5
5
DIO_2
6
DIO_3
7
DIO_0
8
DIO_1
9
GND
10
5VSB
Mini PCIe
M.2
M Key
Front
Audio
1
5
6
1
2
2
9
10
JP3
5
6
1
2
JP5
JP1
Buzzer
1
1
1
1
1
1
1
5
2
SATA 3.0
LVDS
Backlight
Power
SATA
Power
LVDS
Heater and Switch
LED1
LAN1
LAN2
DP++1/2
USB 3/4 (left), 1/2 (right)
(USB 3.1
Note
)
COM1
DIO
CPU Fan
USB 5/6 (USB 2.0)
1
2
2
1
1
1
1
2
9
10
10
9
2
1
10
9
39
40
SPI Flash BIOS
DDR4_1 SODIMM
SMBus
Battery
JP2
1
Mini PCIe
M.2
M Key
Front
Audio
1
5
6
1
2
2
9
10
JP3
5
6
1
2
JP5
JP1
Buzzer
1
1
1
1
1
1
1
5
2
SATA 3.0
LVDS
Backlight
Power
SATA
Power
LVDS
Heater and Switch
LED1
LAN1
LAN2
DP++1/2
USB 3/4 (left), 1/2 (right)
(USB 3.1
Note
)
COM1
DIO
CPU Fan
USB 5/6 (USB 2.0)
1
2
2
1
1
1
1
2
9
10
10
9
2
1
10
9
39
40
SPI Flash BIOS
DDR4_1 SODIMM
SMBus
Battery
JP2
1
Digital I/O
The 8-bit Digital I/O (DIO) connector allows for input/output signals of digital logical states de-
fined by voltage levels.
Digital I/O Pin Assignment
X
Internal I/O Connectors