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Little Board P6d Module
2-43
IrDA Interface
The IrDA interface is described earlier in this chapter.
TTL Serial Ports
The TTL version of the serial ports 1,3, and 4 are brought out to the Utility connector. The TTL
version of serial port 2 can be rerouted to the IrDA TX and RX lines.
Miscellaneous Power Management Signals
Table 2-42 describes miscellaneous Power Management signals.
Table 2-42. Miscellaneous Power Management Signals
Signal Description
LIDSW Simulates the lid switch of a laptop
PWRBTN Turns off all but minimum power or restores power
BATLOW Simulates a low battery condition
RI Ring indicator I/O: Input to wake up from power off; output from serial port 2 RI
SUSV Low current input voltage to support power off.
SUSC Indicates Suspend To Disk (Power Off)
SMBCLK System Management Bus Clock
SMBDATA System Management Bus Data I/O
SMBALRT System Management Bus Alert
BATV External Battery Input (Only used for special options)
PC/104-Plus Expansion Bus
The PC/104-Plus expansion bus appears on three header connectors, J1, J2, and J3. J1 is a 64-pin
female dual-row header. J2 is a 40-pin female dual-row header, and J3 is a 120-pin 2mm female
quad-row header (4 x 30). The PC bus subset of the PC/104-Plus expansion bus connects to J1. The
AT expansion bus signals connect to J2. The layout of signals on J1 and J2 is compliant with the
PC/104 bus specification, and make up the ISA bus portion of the PC/104-Plus bus. An
implementation of the PCI bus appears on J3.
PC/104-compatible expansion modules can be installed on the Little Board P6d expansion bus. The
buffered output signals to the expansion bus are standard TTL level signals. All inputs to the Little
Board P6d system operate at TTL levels and present a typical CMOS load to the expansion bus.
On-board MiniModule Expansion Details
When installed on the PC/104 expansion bus headers, expansion modules fit within the Little Board
P6d module's outline dimensions. You can install one or more Ampro MiniModule products or other
PC/104 modules on the Little Board P6d expansion connectors. When installed on J1 and J2, the
expansion modules fit within the Little Board P6d module’s outline dimensions.