NPM Motionnet G9006, User Manual

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TA600032-EN0/0
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3.
Specification
This chapter shows specifications such as the performance of "G9006".
3.1
Motionnet ® specifications
This section shows the specifications of "Motionnet ® ".
Item Content
Reference clock [MHz] 40 or 80 *1
Transmission speed [Mbps] 2.5, 5, 10 or 20 *2
Response speed [μs] 15.1 / Local LSI (at a transmission speed of 20 Mbps) *3
Communication interface RS-485 and pulse transformer
*4
Communication cable type Dedicated cable or LAN cable (category 5 or higher)
Communication cable length [m] 100 (max), 0.6 (min)
*5
Total extension of communication cable [m/line] 100
Connection method Multi-drop
Number of local LSI connections Up to 64 stations
R e m a r k s
*1
CLK signals of 40 MHz can be input to the reference clock.
If the duty ratio is unlikely to be 50%, such as when connecting multiple LSIs to a single crystal oscillator, it is
recommended that CLK signals of 80 MHz be input as the reference clock.
Which reference clock is input can be selected with the "CKSL" pin.
Whichever you choose, the internal clock frequency is always 40 MHz. The maximum speed is unchanged at 20 Mbps.
*2
The transmission speed is selected with the "SPD0" and "SPD1" pins.
The transmission speed of all LSIs used in one "Motionnet
®
" must be the same.
*3
When the transmission speed is 20 Mbps, the transmission cycle is less than 1 ms (966.4 μs) in a network of up to 64
stations.
*4
A system using a pulse transformer is recommended.
*5
When the length of the communication cable connecting the "Local LSI" is shorter than 0.6 m, consider a multi-stage
connection circuit on the same board.
For details, see "4.5.2
Multi-steps connection circuit".