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Connectors
Power Distribution Board Interface : 34-way header
Signals
SYSTXD
GND
SYSRXD
GND
SYSRTS
SYSCTS
SYSDSR
SYSDCD
SYSDTR
SYSRI
DIAGTXD
GND
DIAGRXD
GND
DIAGDTR
NMI
GND
FAN1 ALARM
FAN2 ALARM
FAN3 ALARM
GND
RESET#
1V2
GND
MBHWTXD
GND
MBHWRXD
GND
AMB_TEMP
Dir
Pin
Description
o/p
1
TXD of system management port (TTL)
2
i/p
3
RXD (TTL)
4
o/p
5
Request To Send (TTL)
i/p
6
Clear To Send (TTL)
i/p
7
Data Set Ready (TTL)
i/p
8
Data Carrier Detected (TTL)
o/p
9
Data Terminal Ready (TTL)
i/p
10
Ring Indicator (TTL)
o/p
11
TXD of diag port (BIOS,driver I/F) (TTL)
12
i/p
13
RXD of diag port (BIOS,driver I/F) (TTL)
14
o/p
15
Receive ready control from S/W (TTL)
16
o/p
17
NMI to motherboard - open collector
18
i/p
19
Fan1 alarm to SMIC
i/p
20
Fan2 alarm to SMIC
i/p
21
Fan3 alarm to SMIC
22
o/p
23
Reset to motherboard
24
25
i/p
26
DC 5V via a 510R, 1% resistor for SMIC
detection
27
o/p
28
TXD of H/W port (diag. processor I/F)
(TTL)
29
i/p
30
RXD of HW port (diag. Processor I/F)
(TTL)
31
i/p
32
33
Ambient temperature exceeded alarm
(1=overtemp)
T e c h n i c a l I n f o r m a t i o n
OWNER'S HANDBOOK 5-47
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