Lexicon 960L - Larc2; General Description

Lexicon
7-39
Larc2
This section describes the theory of operation of the LARC2 main board and related modules. Refer to
Lexicon schematic 060-13379.
General Description
The LARC2 is the remote control unit for the Lexicon 960L Digital Effects System. LARC2 provides easy
access to all of the 960L functions and parameters. A thin cable provides a direct link with the mainframe
from up to 50 feet away or up to 1000 feet with an external12VDC power supply.
The LARC2 system board contains the following standard components:
 Intel SA-1100 Processor
 64KBytes Boot ROM
 8 Mbytes of Flash
 16 Mbytes of EDO DRAM
 Control for 8 motorized faders
 Control for an 640 x 240 LCD display
 Keypad and serial interfaces
 Diagnostic LEDs
SA-1100 CPU
Channel 3
RS232
Debug
Channel0
USB
(Not Used)
Channel 1
RS422
(Host)
LCD
640 x 240
PCMCIA 2
SOCKET
(optional)
PCMCIA 1
8 MB FLASH
(on board)
Channel 2
IrDA
(not used)
Channel 4
CODEC
(not used)
RXD 2
TXD 1
RXD 1
UDC -
UDC +
TXD 2
TXD 3
RXD C
4
LD[7:0]
Inverter
Address [25:0]
Data [31:0]
Motor Drivers
M1 M2 M3 M4 M5 M6 M7 M8
RXD 3
TXD C
Buffers
10
FPGA
8 MByte
DRAM
Meter Bridge (12)
Keypad Backlight
JoyStick
Keypad
8 Touch Controls
8 Wipers
Power
Supply
12V In
Ext In
2 VDC
3.3 VDC
5 VDC
LEXICON
8
10 Bit A/D
Boot FLASH
8
10 Bit A/D
Buffers
PS2
(Keyboard)
Figure 1-1 LARC2 Block Diagram