Specifications

Electrical Specifications Intel® Remote Management Module 2
Revision 1.0
14
4.5 IPMB Specifications
The Intel
®
RMM2 IPMB bus uses 3.3 V signalling.
Table 4. I
2
C Interface
S
y
mbol Parameter Minimum Maximum Unit
Freq Operating frequency 400 KHz
Tbuf Bus free time between Stop and Start condition
(= Tcyc * (I2C_CLK_DIV+16))
4.7 us
thd:sta Hold time after (repeated) start condition. After this
period, the first clock is generated
(= Tcyc * (I2C_CLK_DIV-8))
4.0 us
tsu:sta Repeated Start condition setup time
(= Tcyc * (I2C_CLK_DIV+15))
4.0 us
tsu:sto Stop condition setup time
(= Tcyc * (I2C_CLK_DIV+15))
4.0 us
thd:data Data hold time from SCL 300 ns
tsu:data Data setup time to SCL 250 ns
Tf Clock/Data fall time into 100 pF capacitance and
4.7K ohm pullup.
300 ns
4.6 16550 UART Interface
The Intel
®
RMM2 has one 16550 UART* (RS232) interface for serial communication. By default,
the
RS232 port is disabled.
4.7 MII Interface
The Media Independent Interface (MII) is an Ethernet (IEEE 802.3) standard for communication
between
an Ethernet MAC (Media Access Controller) device and an Ethernet PHY (Physical
layer
interface) device. The MII specification defines 16 pins per port for data and control. The
MII
allows the KIRA100* chip on the
Intel
®
RMM2
to communicate with the 10/100
Ethernet
PHY
chip on the Intel
®
GCM3 card.
The Intel
®
GCM3 module provides the RJ 45 connector for connection to the LAN via a Category
5 network cable. The RJ45 connector on the Intel
®
GCM3 module has two LEDs that indicate the
LAN connector state. One of the LEDs indicates link activity and the other indicates the LAN
speed (10 or 100 Mb/S).