Technical Product Specification

Intel® Server Chassis SC5600 Hot-swap Hard Disk Drive Bays
Revision 1.1
Intel order number E39532-004
65
Table 52. 7-pin SAS Connector Pin-out
Connector Contact Number Signal Name
1 GND
2 SASn_EP_RX_P
3 SASn_EP_RX_N
4 GND
5 SASn_EP_TX_N
6 SASn_EP_TX_P
7 GND
6.2.1.3 I
2
C Serial Bus Interface
The Vitesse VSC7161* SAS Expander supports two independent I
2
C interface ports with bus
speed of up to 400 Kbits. The I
2
C bus at port 0 supports a TI TMP75* or equivalent I
2
C-based
temperature sensor. This enables actual temperature value readings to be returned to the host.
This bus also supports an AT24C64* EEPROM or equivalent I
2
C –based EEPROM used as a
FRU. The Intelligent Platform Management Bus (IPMB) is supported through I
2
C port 1.
The following figure provides a block diagram of the I
2
C bus connection implemented on the
4HDD and 6HDD Active SAS/SATA HSBP.
z
Addr=0xC0 or 0xC2
IPMB
A
ddr = 0xA0
Port 0
Port 1
EEPROM
FRU Temp
VSC7161
146 & 147
Sensor
A
ddr = 0x90
148 & 149
LEVEL SHIFT
Figure 30. Active SAS/SATA HSBP I
2
C Bus Connection Diagram
6.2.1.4 I
2
C Bus Address and Loading
Table 53. I
2
C Bus Addressing
TMP75* I
2
C Address
AT24C64* I
2
C Address
VSC410* I
2
C port2
90h A0h C0h or C2h