Fujitsu MAB3045, MAC3045, MAB3091, MAC3091, MAA3182 manual

2)Inputs the master signal when the IDD carries out rotational synchronization with the external master signal.

This signal is pulled up with 3 kΩ resistor internally, it is necessary to connect the external terminating resistor.

For details of spindle synchronization function , refer to Section 3.1, in the SCSI Logical Interface Specifications.

CAUTION

Make the CN1-A6 pin or CN7-10 pin open when not having the

IDD carry out spindle synchronization.

d.–DISCON (–disable terminator connection)/TERMON (terminator on): Input signal

The CN1-A9 (TERMON) or CN6-06 (–DISCON) pin setting specifies whether to operate the terminating resistor built-in to the IDD. Table 4.2 shows the electrical requirements.

See Subsection 5.4.4 for the requirements for terminating resistor operation.

Table 4.2 External inputs for operating terminating resistor (16-bit single-ended type)

Input level	Function
0 to 0.4 VDC	The terminating resistor operates.
(Open)	The terminating resistor does not operate.

Note:

When the external operator panel is connected to the CN1-A9 pin and the operation of the terminating resistor is set on the external operator panel, the corresponding CN6-06 pin must always be set to open.

See Subsection 5.3.3.

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