3. External Connection
DIO-32DM3-PE
33
Connection method to the external device
-Data I/O-
Connecting the data I/O signal(DIOA0* - DIOD0*)
These lines input from and output to external devices and can be configured in 16bit with the software.
Input and output and setting procedures are the same whether these lines are used for general-purpose
digital I/O or bus master transferring and they can be configured in three different settings as shown
below:
Table 3.4. I/O signal
Signal name
Setup1
Setup2
Setup3
DIOA00 - DIOA07
Input
Input
Output
DIOB00 - DIOB07
Input
Input
Output
DIOC00 - DIOC07
Input
Output
Output
DIOD00 - DIOD07
Input
Output
Output
When settings 1 and 2 are used for general-purpose digital I/O, DIOA00 through DIOA03 can be used
as interrupts (rising edge).
Detailed Data I/O Signal Circuit
Figure 3.3. Data I/O Signal Circuit
Board
External circuit
5V TTL IC or LVTTL IC
DIO
A**
DIO B**
DIO C**
DIO D**
INPUT/OUTPUT
GND
GND
22Ω
3.3V
5.0V
10k
SN74LVT245B
or equivalent
Summary of Contents for DIO-32DM3-PE
Page 7: ...vi DIO 32DM3 PE ...
Page 17: ...1 Before Using the Product 10 DIO 32DM3 PE ...
Page 35: ...2 Setup 28 DIO 32DM3 PE ...
Page 47: ...3 External Connection 40 DIO 32DM3 PE ...
Page 57: ...5 About Software 50 DIO 32DM3 PE ...
Page 62: ......
