Specifications

Chapter 3 Hardware
LittleBoard 800 Reference Manual 31
• True Line Level Output with volume control independent of Line Out
Table 3-11 describes the pin signals of the audio interface, which uses 26 pins, 2 rows, odd/even, (1, 2) with
2mm pitch.
Note: The shaded areas denote power or ground.
Video Interfaces
The 82855GME chip provides the graphics control and video signals to the traditional glass CRT monitors
and LCD flat panel displays. The chip features are listed below:
CRT features:
• Supports a max resolution of 2048 X 1536
• Supports a maximum allowable video frame buffer size of 32MB shared memory
• AGP 4X graphics performance (always enabled)
Table 3-11. Audio Interface Pin/Signal Descriptions (J9)
Pin # Signal Description
1 VIDEO_L Video-Audio signal in left channel
2
VIDEO_GND Video Audio ground
3 VIDEO_R Video-Audio signal in right channel
4 CD_L CD-ROM signal left channel
5
CD_GND CD-ROM Audio ground
6 CD_R CD-ROM signal right channel
7 LINE_IN_L Line in signal left channel
8
LINE_IN_GND Line in Audio ground
9 LINE_IN_R Line in signal right channel
10 MIC1 Microphone in signal 1 or left channel
11
MIC_GND Microphone Audio ground
12 MIC2 Microphone in signal 2 or right channel
13 MIC_REF Microphone reference signal
14 NC/KEY Not Connected - Key
15 PHONE_IN Phone signal in
16
PHONE_GND Phone Audio ground
17 MONO_OUT Monaural signal out
18
MONO_GND Monaural Audio ground
19 +AOUT_L - Audio out signal left channel
20
-AOUT_L + Audio out Audio ground
21 +AOUT_R - Audio out signal right channel
22
-AOUT_R + Audio out Audio ground
23
GND Audio Ground (tied to all audio grounds)
24 HP_L Headphone signal left channel
25 HP_R Headphone signal right channel
26 NC Not Connected