ADLINK Technology ReadyBoard 910, Reference Manual

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Chapter 3 Hardware
ReadyBoard 910 Reference Manual 33
Serial Console
The ReadyBoard 910 supports the serial console (or console redirection) feature. This I/O function is
provided by an ANSI-compatible serial terminal, or the equivalent terminal emulation software running on
another system. This can be very useful when setting up the BIOS on a production line for systems that are
not connected to a keyboard and display.
Serial Console Setup
The serial console feature is implemented by connecting a standard null modem cable or a modified serial
cable (or “Hot Cable”) between one of the serial ports, such as Serial 1, and the serial terminal or a PC with
communications software. The BIOS Setup Utility controls the serial console settings on the
ReadyBoard 910. Refer to Chapter 4 , BIOS Setup for the settings of the serial console option, the serial
terminal, or PC with communications software and the connection procedure.
Hot (Serial) Cable
To convert a standard serial cable to a Hot Cable, certain pins must be shorted together at the Serial port
(DB9) connector. Short together pins 7 (RTS) and 9 (RI) on Serial port 1 (DB9) connector as shown in
Figure 3-3 .
Figure 3-3. Hot Cable Jumper
System Management Bus (SMBus)
The PCH contains both a host and slave SMBus ports; but the host cannot access the slave internally. The
slave port allows an external master access to the PCH through headers JP7 and JP8. The master is used to
communicate with the SODIMMs and the clock generator.
Table 3-14 lists the slave device names and
corresponding reserved binary addresses on the SMBus. Table 3-15 lists the pin signals for the SMBus
DATA header, which provides 2 pins, 1 row, and 0.079" (2mm) pitch. Table 3-16 lists the pin signals for the
SMBus CLOCK header, which provides 2 pins, 1 row, and 0.079" (2mm) pitch.
Note: The shaded area denotes power or ground. The signals marked with * = Negative true logic.
Table 3-14. SMBus Reserved Addresses
Component Address Binary
SODIMM A 1010,000x
b
SODIMM B 1010,010x
b
Clock Generator 1101,001x
b
Table 3-15. SMBus DATA Interface Pin Signal Descriptions (JP7)
Pin # Signal Description
1 SMBDATA SMBus Data
2 +3.3V +3.3V standby voltage
Table 3-16. SMBus CLOCK Interface Pin Signal Descriptions (JP8)
Pin # Signal Description
1 SMBCLOCK SMBus Clock
2 GND Ground
Standard DB9 Serial
Port Connector (Female)
Rear View
5 4 3 2 1
9 8 7 6
RB910_hotcable