ASRock IMB-1214 [17/38] Com port headers
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ASRock IMB-1214 [17/38] Com port headers

ASRock IMB-1214 [17/38] Com port headers
17
COM Port Headers
(9-pin COM1, 2, 3, 4: see p.8, No. 3)
RESET (Reset Switch):
Connect to the reset switch on the chassis front panel. Press the reset
switch to restart the computer if the computer freezes and fails to perform a
normal restart.
PLED (System Power LED):
Connect to the power status indicator on the chassis front panel. The LED
is on when the system is operating. The LED keeps blinking when the sys-
tem is in S1/S3 sleep state. The LED is o when the system is in S4 sleep
state or powered o (S5).
HDLED (Hard Drive Activity LED):
Connect to the hard drive activity LED on the chassis front panel. The LED
is on when the hard drive is reading or writing data.
The front panel design may dier by chassis. A front panel module mainly
consists of power switch, reset switch, power LED, hard drive activity LED,
speaker and etc. When connecting your chassis front panel module to this
header, make sure the wire assignments and the pin assign-ments are
matched correctly.
* This motherboard supports RS232/422/485 on COM3 port. Please refer to below table for
the pin denition. In addition, COM3 port (RS232/422/485) can be adjusted in BIOS setup
utility > Advanced Screen > Super IO Conguration. You may refer to page 29 for details.
COM3 Port Pin Denition
PIN
Signal
Name
PIN
Signal
Name
PIN
Signal
Name
PIN
Signal
Name
PIN
Signal
Name
1
DDCD# 3 TTXD 5
GND
7
RRTS# 9 PWR
2 RRXD 4 DDTR# 6 DDSR# 8 CCTS#
2
1
PIN RS232 RS422 RS485
1 DCD TX- RTX-
2 RXD RX+ N/A
3 TXD TX+ RTX+
4 DTR RX- N/A
5 GND GND GND
6 DSR N/A N/A
7 RTS N/A N/A
8 CTS N/A N/A
9 PWR PWR PWR

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