Table of Contents
Advertisement
3. External Connection
Connection method to the external device
-Control I/O-
Connection to the control signal (EXT**)
In order to control bus mastering from outside, five signals are provided each for pattern I/O. Before
using the signals to be input as control signals please verify their pulse widths.
"0" at the end of a signal name indicates a pattern input signal and "1" a pattern output signal.
Table 3.5. Control signal
Signal name
Direction
EXTCLK0
In
EXTSTART0
In
EXTSTOP0
In
EXTREQ0
In
EXTACK0
Out
Detailed Control Input Signal Circuit
Control signals to be input include clock, start, stop, and handshake input signals.
SN74LV245A
Figure 3.4. Control signal input circuit
32
Usage
Pattern input clock
Pattern input start signal
Pattern input stop signal
Pattern input REQ signal
Pattern input ACK signal
Board
EXTCLK0/1
EXTSTART0/1
EXTSTOP0/1
3.3V
5.0V
10k
22Ω
Input pin
GND
Signal name
Direction
EXTCLK1
EXTSTART1
EXTSTOP1
EXTREQ1
Out
EXTACK1
External circuit
EXREQ0
EXTACK1
5V TTL IC or LVTTL IC
GND
Usage
In
Pattern output clock
In
Pattern output start signal
In
Pattern output stop signal
Pattern output REQ signal
In
Pattern output ACK signal
DIO-32DM2-PE
Advertisement
Table of Contents
