Serial Port Connectors; Table 99: Legacy 34-Pin Floppy Drive Connector Pin-Out (J3K2); Table 100: External Rj-45 Serial B Port Pin-Out; Table 101: Internal 9-Pin Serial A Header Pin-Out (J1A3) - Intel SE7520JR2 Technical Manual

Connectors and Jumper Blocks

Table 99: Legacy 34-pin Floppy Drive Connector Pin-out (J3K2)

7.5.7

Serial Port Connectors

The Server Board SE7520JR2 provides one external RJ45 Serial B port and one internal 9-pin
Serial A header. The following tables define the pinouts for each.
196
Pin Signal Name
1 GND
3 GND
5 KEY
7 GND
9 GND
11 GND
13 GND
15 GND
17 Test Point
19 GND
21 GND
23 GND
25 GND
27 Test Point
29 GND
31 GND
33 GND

Table 100: External RJ-45 Serial B Port Pin-out

Pin Signal Name
1 RTS Request To Send
2 DTR Data Terminal Ready
3 TXD Transmit Data
4 GND Ground
5 RI Ring Indicate
6 RXD Receive Data
7 DSR / DCD Data Set Ready / Data Carrier Detect1
8 CTS Clear To Send
Note:
1. A jumper block on the server board will determine whether DSR or DCD is routed to
pin 7. The board will have the jumper block configured with DSR enabled at
production.

Table 101: Internal 9-pin Serial A Header Pin-out (J1A3)

Pin
1 DCD (carrier detect)
2 DSR (data set ready)
Pin Signal Name
2 FD_DENSEL0
4 Test Point
6 FD_DENSEL1
8 FD_INDEX_L
10 FD_MTR0_L
12 FD_DS1_L
14 FD_DS0_L
16 FD_MTR1_L
18 FD_DIR_L
20 FD_STEP_L
22 FD_WDATA_L
24 FD_WGATE_L
26 FD_TRK0_L
28 VCC
30 FD_RDATA_L
32 FD_HDSEL_L
34 FD_DSKCHG_L
Description
Signal Name
C78844-002
Intel® Server Board SE7520JR2
Revision 1.0