User’s Manual
8
ROBO-503/ROBO-503N User’s Manual
2.3.4 PC/104 Interface
The CS5530A companion chip provides a PCI-ISA Bridge that may operate in master or
slave mode. ECM-3410 only support ISA slave mode. ISA master mode allows an ISA
board to grant the bus and thereby get the bus master status. The bus master has the
ability to generate bus cycles and thereby transfer data without involvement of the CPU or
DMA (Direct memory access). However, ISA add-on card which utilizes the bus master
mode is very rare today. A 104-pin PC/104 connector is equipped onboard for future
expansion.
2.3.5 SDRAM Interface
This board uses SDRAM in the compact SODIMM-144 form factor. 3.3V PC 100 SDRAM
modules are recommended to be used.
2.3.6 TFT Panel Interface
An alternative display to the standard CRT monitor is a digital flat panel interface in which
the color of each pixel is digitally encoded. The panel data may be transferred in parallel
where the color of each pixel is transferred over a number of signal lines at rates up to
65MHz.
The parallel interface is only suitable for short distance (less than 50 cm) and is typically
implemented by using of ribbon cables. One should be careful in the EMC design of the box
and cabling when this interface is used.
It should also be noted that the signal level of this interface is 3.3V, but does comply with
the TTL signal levels. Some - most older displays require 5V signal level.
2.3.7 Audio
The CS5530A companion chip provides audio support through an AC97 codec interface.
The audio codec provides mixing of the analog signals as well as Digital/Analog conversion.
The following analog interfaces are provided.
n
Line-in, stereo.
n
CD-ROM input, stereo.
n
Microphone, single input with microphone bias circuit.
n
Line-out, stereo.
n
Speaker out, stereo, 2 x 0.5 Watt.
Access to the audio signals is provided by a 5 x 2 header (CN11) or by an optional audio
bracket.
