Intel® Server Board SE7520AF2 TPS
Functional Architecture
Revision 1.2
69
Intel order number C77866-003
Pin
Name
IO/GPIO
Intel® Server Board SE7520AF2 Use
22
GPIOE41
Input/Output
Riser Detect 0
35 GPIOE42
Input/Output MROMB
49
GPIOE43
Input/Output
SIO > ICH5R PME
38 GPIOE44/SCI
Input/Output IMM
SCI
51 GPIOE45/LED Input/Output BMC
(IMM) Card Presence Detect
48
GPO61/SMBSA
Output
LAN A Disable
45
GPO62/LFCLK
Output
LAN B Disable
80
GPEXC
Output
Port 80 Register Clock
79 GPEXD
Input/Output Serial
Data
81
GPEXC2
Output
FRU Register Clock
3.4.10.2 Serial
Ports
The Intel® Server Board SE7520AF2 supports two serial ports:
One DB-9 connector located on the back I/O area of the baseboard enabling Serial
Port A
One 9-pin DH-10 header on the server board enables an optional Serial Port B
Serial Port B is an optional port, accessed through a on-board 9-pin internal DH-10 header. A
standard DH-10 to DB9 cable can be used to direct Serial Port A out the back or front of a
chassis.
Table 24. Serial A Header Pin-out
Pin
Signal Name
Serial Port A Header Pin-out
1 DCD
2 DSR
3 RX
4 RTS
5 TX
6 CTS
7 DTR
8 RI
9 GND
3.4.10.3 Floppy Disk Controller
The floppy disk controller (FDC) in the SIO is functionally compatible with floppy disk controllers
in the DP8473 and N844077. All FDC functions are integrated into the SIO including analog
data separator and 16-byte FIFO. The Intel® Server Board SE7520AF2 provides access to the
floppy interface via an SSI-compliant 36-pin connector.