OCX256LTB792 Fairchild Semiconductor, OCX256LTB792 Datasheet - Page 5

• Manufacturer Part Number: OCX256LTB792
• Manufacturer: Fairchild Semiconductor

Specifications of OCX256LTB792

• Number Of Arrays: 1
• Differential Data Transmission: Yes
• Power Supply Requirement: Single
• Mounting: Surface Mount
• Line Code: NRZ
• On-chip Buffers: Yes
• On-chip Decoder: No
• On-chip Latch Circuit: No
• On-chip Mux/demux: No
• Dual Supply Voltage (typ): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Dual Supply Voltage (min): Not RequiredV
• Lead Free Status / RoHS Status: Compliant

Introduction
X = Don’t care.
RCI[3:0]
Cycle 1 Output Port
Cycle 2
0000
0001
0010
0100
0101
1000
1001
1010
0011
0110
0111
1011
1100
1101
1110
1111
Output Port
Output Port
Output Port
Output Port
RCA[6:0]
Address
Address
Address
Address
Address
X
X
X
X
X
X
(Continued)
Input Port
Input Port
Input Port
Input Port
Input Port
Input Port
RCB[6:0]
Address
Address
Address
Address
Address
Address
Data
X
X
X
X
TABLE 3. RapidConfigure Programming Instructions
Output Data
RCO[4:0]
X
Readback Crosspoint,
Output Buffer Status
ImpliedDisconnect
ImpliedDisconnect
Crosspoint Array
Disconnect Input
Disconnect Input
Broadcast Mode
Output Buffer
Instruction
Configure
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Set Array
Connect,
Connect,
Reset All
Update
without
Output
Reset
with
and
an
to
5
Reset, along with an Update operation (UPDATE
pin or Update command), resets the entire cross-
point array to no connect. All Output Buffers
remain unchanged by this operation.
Connects the input selected by RCB[6:0] to all
output ports and disconnects all other inputs. The
Global Update (UPDATE) pin must be held high
during Broadcast mode. Activating the Global
Update pin returns the array to the previous pro-
gram condition.
Program an Output Buffer specified by RCA[6:0].
See Table 5 for RCB[6:0] bit assignment and
buffer functionality.
This is a two-cycle instruction.
Specify the crosspoint connect status at output
location specified by RCA[6:0] to the input location
specified by RCB[6:0].
Readback (using RCO[4:0]) the status of the out-
put buffer specified in Cycle 1 by RCA[6:0], the
output buffer specified in Cycle 1 by RCO[4:0] and
the crosspoint connect status.
See Table 4 for RCO[4:0] readback pin assign-
ment.
Program the Global Update function without the
use of the UPDATE pin.
Disconnect the crosspoint cells of the output row
location specified by RCA[6:0].
Disconnect the crosspoint cell at the output loca-
tion specified by RCA[6:0] to the input location
specified by RCB[6:0].
All other connections from the source input
address or to the same output address remain the
same as before.
Connect the crosspoint cell at the output location
specified by RCA[6:0] to the input location speci-
fied by RCB[6:0].
All other connections from the same input address
or to the same output address are set to No Con-
nect (NC).
Connect the crosspoint cell at the output location
specified by RCA[6:0] to the input location speci-
fied by RCB[6:0].
All other connections to the same output address
are set to No Connect while all other connections
from the same input address remain the same as
before.
Reset the switch matrix to No Connects (NC).
Update is forced internally. Sets the Output Buffer
to Flow-through mode with Output Enabled.
Description
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Preliminary