SE7221BK1-E Technical Product Specification
31
Table 31. 9-pin Header Serial B Port Pin-out (J1B1)
Signal Name Pin Pin Signal Name
DCDB 1 2 DSRB
RXDB 3 4 RTSB
TXDB 5 6 CT SB
DTRB 7 8 RIB
GND 9 10 Key

7.11 Keyboard and Mouse Connector

Two PS/2 ports are provided for use by a keyboard and a mouse. The following table details the

pin-out of the PS/2 connectors.

Table 32. Keyboard and Mouse PS/2 Connectors Pin-out (KM9A1)
PS/2 Connectors Pin Signal Name
K1 RKBDATA
K2 NC
K3 GND
K4 P5V_KB_MS
K5 RKBCLK
Keyboard
K6 NC
M1 MSEDATA
M2 NC
M3 GND
M4 P5V_KB_MS
M5 RMSCLK
Mouse
M6 NC

7.12 Miscellaneous Headers

7.12.1 Fan Header

There are four 3-pin fan headers. (JP5J1, JP5J2, JP7A1, and JP6A1) These fan headers have

the same pin-out and are detailed below.

Table 33. Three-pin Fan Headers Pin-out (JP5J1, JP5J2, JP7A1, JP6A1)
Pin Signal Name Type Description
1 Ground Power GROUND is the power supply ground
2 Fan Power Power Fan Power with FAN_SPEED_CNTL1 (Fan speed control)
3 Fan Tach Out FAN_TACH signal is connected to the LM96000 to monitor the FAN
speed.