IBASE MB839 - Manual (Page 51)

APPENDIX
MB839 Series User’s Manual 45
E. Register of the LAN Bypass Controller
To fulfill the varied requests on LAN Bypass controller, IBASE provide
the smart LAN Bypass controller. User can define the Bypass function
behavior when the system is power-on, power-off and WDT signal is
asserted.
The controller is behind the SMBus controller. The I
2
C address is listed
as below:
I
2
C Address (8bit) Remark
1
st
Controller 0x68
2
nd
Controller 0x6A Optional
CR 0x22 : System-On Bypass Register
Attribute : Read / Write
Reset default : 0x0000
Bit
LAN
Port#
Read /
Write
Description
0 Eth3, 4
Read /
Write
Enable / Disable LAN Bypass
function when the system is
power On.
1 = Enable LAN Bypass function
0 = Disable LAN Bypass function
CR 0x24 : System-Off Bypass Register
Attribute : Read / Write
Reset default : 0x0000
Bit
LAN
Port#
Read /
Write
Description
0 Eth3, 4
Read /
Write
Enable / Disable LAN Bypass
function when the system is power
Off.
1 = Enable LAN Bypass function
0 = Disable LAN Bypass function