Microphone Level Control - Mitsubishi Electric LS Pro Hardware Technical Reference

Bits 3, 4
Bit 5
Bits 6, 7
Microphone
7 6 5 4 3
level control
Bits 0, 1
Bits 2, 3
Bits 4
Bit 5
Bits 6,7
Note
The function of this port is different on Rev C system boards. Refer to Appendix B for further
information.
Memory and I/O Usage
These two bits select the size of page used to access the Token Ring
daughterboard's shared RAM. The default window size is 16Kbytes.
4
0
0
1
1
This bit selects one of the two PROM pages. When set to 0 page 1 is
selected, for an 8-bit adapter. When set to 1 page 2 is selected, for a 16-
bit adapter. This bit should normally be set to the same value as the bus
width bit (bit 2).
Reserved.
2 1 0
reserved
VOL0
VOL1
mono
diagnostic LED
reserved
Reserved.
These two bits control the sensitivity of the microphone input.
Bit
3
0
0
1
1
When this bit is low (default) the audio subsystem operates in stereo
mode. When high the audio system operates in mono mode.
When this bit is low (default) the diagnostic LED on the system board
is lit. When it is set high the LED is not lit.
Reserved.
LS PRO HARDWARE TECHNICAL REFERENCE 5/13
3 Page size
0 16 Kbytes
1 8 Kbytes
0 64 Kbytes
1 32 Kbytes
Input level (rms)
2
0 7.75mV
1 77.5mV
0 0.775V
1 2V