NPM Motionnet G9001A, User Manual

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DA70131-1/3E
II-10
4-4-12. SOEH,
______
SOEL
Output enable signal for communication.
The difference between the SOEH and
_____
SOEL is that the logic is inverted.
When sending, SOEH = HIGH and
_____
SOEL = LOW.
4-4-13. SOEI
When using more than one I/O device, connect the SOEH signal of the other I/O device to this terminal.
By being wire OR'ed with the output enable signal from this I/O device, the device outputs an enable signal to
SOEH or
_____
SOEL .
4-4-14. SI
Serial input signal for communication. (Positive logic)
4-4-15.
______
MRER
Monitor output used to check communication quality.
When the I/O device receives an error frame such as a CRC error, this terminal goes LOW for exactly 128 CLK
cycles (3.2 us).
By timing this interval using a counter, you can check the quality of the communication.
4-4-16.
______
MSEL
Communication status monitor output.
When the I/O device receives a frame intended for this device and everything is normal (when communication
MFER is OFF), this terminal goes LOW for exactly 128 CLK cycles (3.2 us). This can be used to check the cyclic
communication time.
4-4-17. BRK
By providing HIGH pulses that are longer than the specified interval, the I/O device will be made to wait for a break
frame.
When the I/O device receives a break frame send request from a center device, it immediately sends a break
frame.
A pulse at least 3200 usec long is needed, in order to be seen as the BRK input pulse (positive logic).
4-4-18. PMD0 to PMD2
Terminals used to determine the port direction of the four I/O ports.
These terminals can set the ports as follows:
PMD2 PMD1 PMD0 P0(7:0) P1(7:0) P2(7:0) P3(7:0)
L L L Output Output Output Output
L L H Input Output Output Output
L H L Input Input Output Output
L H H Input Input Input Output
H L L Input Input Input Input
When PMD0 to 2 are set other than as shown above, all the ports will be input ports. However, do not use any
settings not shown.
4-4-19 .
____
P0N,
____
P1N,
____
P2N,
____
P3N
Specify the input/output logic for each port. (
____
P0N
corresponds to port 0,
____
P1N
corresponds to port 1,
____
P2N
corresponds to port 2, and
____
P3N
corresponds to port 3.)
If a port is set HIGH by the corresponding
____
PxN
terminal, then when this port is HIGH the center device will see a 1.
If a port is set LOW by the corresponding
____
PxN
terminal, then when this port is LOW the center device will see a 1.