ocx256 ETC-unknow, ocx256 Datasheet - Page 17

• Manufacturer Part Number: ocx256
• Description: Ocx256 Crosspoint Switch
• Manufacturer: ETC-unknow

0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
I [3:0]
1.4.8
Fairchild Semiconductor
BB
X
X
X
X
X
X
X
X
JTAG Instructions
Clock
Select
BA
X
X
X
X
X
X
X
Mode
Data
B9
X
X
X
X
X
X
X
OE
B8
X
X
X
X
X
X
X
OE
B7
X
X
X
X
X
X
X
Table 8
Output Address/
Output Buffer
Address
OCX256 Crosspoint Switch—Advanced Datasheet
A6-A0
Buffer
[Rev. 2.0] 3/21/02
X
X
X
X
X
X
JTAG Instructions
Sample/EXTEST
Sample/EXTEST
Reset the Crosspoint
Array
Set Array for
Broadcast mode
Program a Buffer
Configuration
readback
Update the
Crosspoint Array
Disconnect Input
cell
Instruction
Places the device in scan mode.
Places the device in scan mode.
Resets the entire Crosspoint Array to no-connect. All
other Output Buffer configurations are unchanged by
this operation.
Use the JTAG Address Register as the Input address to
be the broadcast input Connects the selected Input to
all Output cells and disconnects all other Inputs.
Activating the Global Update JTAG instruction returns
the Crosspoint array from the Broadcast mode to the
previous programed state.
Programs the Output Buffer address specified in the
JTAG instruction (A6-A0). The configuration data is
also specified in the JTAG instruction bits BA-B7. See
Table 9 for bit assignment of the Buffer functionality.
Readback the connectivity of the Crosspoint cell with
the Input location specified in the JTAG Address
Register and the Output location specified JTAG
instruction (A0-A6). It also returns the configuration of
the Output Buffer addressed in the JTAG instruction
(A0-A6).
The readback data is shifted out of TDO in the
following sequence:
NOTE: This instruction does not increment the JTAG
Address Register. This instruction also requires two
DR cycles
Update the programmed connection from the Loading
SRAM to the Active SRAM.
Disconnect the Crosspoint connections from the Input
address specified in the JTAG Address Register.
1. Crosspoint Connect (1=connected, 0=no
2. Output Enable—B7 (see Table 9)
3. Output Enable—B8 (see Table 9)
4. Output Data Source—B9 (0=Flow-through,
5. Output Clock Select—BA (0=Global Clock,
6. State of Broadcast bit
7. State of the RCE bit
connection)
1=registered)
1=Next Neighbor)
Description
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