Lexicon 960L Service Manual page 84
Multi-channel digital effects system
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Also See for 960L:
- Owner's manual (101 pages) ,
- Owner's manual addendum (36 pages) ,
- Installation instructions manual (24 pages)
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960L Multi-Channel Digital Effects System Service Manual
and serial audio data and clock signals. R15, R16, and C1 provide filtering for the SYSTEM_RESET/ signal
provided by the DSP cards. The cards in the IO backplane can also interrupt the DSP cards by asserting
the IOBUS_INT/ signal. The ALL_MUTE/ signal is provided to allow for a hardware assisted system wide
mute. Pullup resistors, R28-R32 are provided to establish a default undriven signal level for signals
PWR_OK, IOBUS_INT/, IOBUS_DS/, IOBUS_AS/, ALL_MUTE/, respectively.
IO Backplane Slot Connectors
The IO backplane bus is comprised of the system control bus, serial audio clocks, serial audio data (in octal
format), MIDI pass thru connections, RS232 pass thru connections. Each IO card plugs into 96-pin EURO
style connectors, J1-J5.
Slot Addressing
Decoder, U1, provide slot addressability by decoding the system control bus address signals ADDR11:9.
Each slot is allocated a 512 byte address space. The address map is as follows:
7-6
TMIX1_SERD(3:0)
1:0/AIN, 3:2/DIN
TMIX1_SERD(11:10)
Expansion
TMIX2_SERD(3:0)
5:4/AOUT/7:6(DOUT)
TMIX2_SERD(11:8)
Expansion
TMIX_WCKI
TMIX "512fs" clk
TMIX_CKI/2
TMIX 256fs clock
TMIX_CKI
TMIX "wc" clk
WCLK
Master WCLK
256FS
Master 256FS
128FS
Master 128FS
64FS
Master 64FS
SLOT_WCLK
System WC
SLOT_SEL/
One unique sel. per slot
IOBP_ADDR(8:0)
Control Bus Addr
IOBP_DATA(7:0)
Control Bus Data
RESET/
Master Reset
Preview_WCK INT/
Preview Word Clock INT
IOBP_RD/
Control Bus Read
IOBP_WR/
Control Bus Write
IOBP_AS/
Control Bus AS
PWROK
Power OK
ALL_MUTE/
Panic Mute
IOBP_DS/
XCVR EN
IOBP_INT/
Interrupt
+12V
From NLX Supply
+5V
From NLX Supply
-12V
From NLX Backplane
GROUND
From NLX Supply
MIDI_TX
From NLX IO Panel
MIDI_RX
From NLX IO Panel
RS232 TX1
From NLX IO Panel
RS232 TX2
From NLX IO Panel
RS232 RX1
From NLX IO Panel
RS232 RX2
From NLX IO Panel
Table 2-1 IO Backplane Signal List
Slot 1(top)
Slot 2
Slot 3
Slot 4
Slot 5(bottom)
Table 2-1 Slot Address Map
O
Pullup
O
Pullup
I
Pullup
I
Pullup
O
Active
O
Active
O
Active
O
Active
O
Active
O
Active
O
Active
3st
Active
I
I
IO
I
Pullup
3st
Active
I
On IOBP
I
On IOBP
I
On IOBP
I
Pulldn
OD/OC
Pullup
I
On IOBP
OD/OC
Pullup
I
I
I
I
I
O
I
I
O
O
0x000-0x1FF
0x200-0x3FF
0x400-0x5FF
0x600-0x7FF
0x800-0x9FF
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Troubleshooting
