ocx1601 ETC-unknow, ocx1601 Datasheet - Page 8

• Manufacturer Part Number: ocx1601
• Description: Ocx1601 Crosspoint Switch
• Manufacturer: ETC-unknow

OCX1601 Crosspoint Switch—Advanced Datasheet
1.1 Input and Output Buffers
8
Ax
Ax
Px
All of the I/O buffers are differential with flow-through mode. Figure 3 shows the basic block diagram of
the input and output blocks with the sources for the output control signals (OE#). The control signals are
explained in more details in the following sections.
1.1.1 Input and Output Port Function Mode
1.1.2
OE#
The following legend describes the various modes of the Input and Output Ports and the
specification used by the OCXPro™ Software.
Legend:
Ax–Switch Matrix Signal
Px–Port Signal
OE#–Output Enable (# means “Active Low”)
Broadcast Mode
The OCX1601 has a special Broadcast Mode which connects any input to all outputs without
performance degradation. The input is selected using RapidConfigure or Serial interface and
disconnects all other inputs. The Global Update pin (UPDATE#) must be held high during
Broadcast Mode. Asserting the UPDATE# pin returns the array to the previous program condition.
Symbol
Input
Px
Px
Ax
Table 1
Figure 3
Summary for Programmable I/O Attributes for OCX1601
Input – The external signal is buffered from the Input Port pin
to the corresponding Switch Matrix line.
Output – The internal signal is buffered from the
corresponding Switch Matrix line to the Output Port pin. In
this mode an optional output enable (OE#) can be selected.
The default state is logic high with enable set to ON.
No Connect – In this mode, the output Port pin is isolated
from the Switch Matrix.
[Rev. 1.8] 3/21/02
Input and Output Buffer Configuration
Switch
Matrix
I/O Port Function
OE#
Output
Fairchild Semiconductor
Mnemonic
OP
NC
IN