American Megatrends MegaRAC M300V, User Manual

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60 MegaRAC® M300V Card Implementer’s Reference and User’s Guide
MCARD_AUX_SoL_CTRL_L = Logic High
This signal should have a Pull-Up on the motherboard when the MegaRAC M300V is not present,
this signal should be
Logic High
. The motherboard’s UART control signals are routed to the
motherboard’s serial connector, the X5 MUX direction is from A to Y.
X1
X2 X3
X4
X5
RS232 xlator
Connector
UART0 UART1
UART
BMC
CLI
Generator
ESC Snoop
BMC
Local Bus
Management
NIC
Ethernet
Super I/ O
Host System
Handshake Signals
UAR
T Handshake Signals
SoL / ESC Snoop
TxD, RxD
mCard
Present
B not used when card installed
On-card TxD/ RxD
signal mux control
Handshake signal mux control
from mCard
Driven by UART but not felt at connector
TxD, RxD
TxD, RxD
Rx
A
B
Y
A B
Y
A
B
Y
A
B
Y
A B
Y
X1
X2 X3
UART0 UART1
BMC
CLI
Generator
E
SC Snoop
BMC
Local Bus
M
ana
g
emen
t
NI
C
SoL / ESC Snoop
T
x
D,
R
x
D
On-card TxD/ RxD
signal mux control
Rx
A
B
Y
A
B
Y
A
B
Y