Toshiba 6F3B0250, PROSEC T1 T1S High speed counter Single phase up-counter, Hardware condition

8. Special I/O Functions

8.3 High speed counter

8.3.1Single phase up-counter

Function

When the count input is changed from OFF to ON, the count value is increased by 1. When the count value reaches the set value, the count value is reset to 0, and I/O interrupt program is activated (if the interrupt enable flag is ON). The count value is reset to 0 when the reset input comes ON.

This counter operation is enabled while the soft-gate is ON. The count value is reset to 0 when the soft-gate is changed from ON to OFF.

The set value is set internally at the timing of the soft-gate changing from OFF to ON. When the soft-gate is OFF, the count value can be changed by writing the data into the set value register and setting the count preset flag to ON.

The count value range is H0000 to HFFFF (16-bit data).

Hardware condition

Count input (X000 and X001)

ON/OFF pulse width: 100 ms or more (max. 5 kHz)

Reset input (X002 and X003)

ON/OFF duration: 2 ms or more

Related registers

SW16: Function selection. Refer to section 8.1.

Function	Register/device		Remarks
	Channel 1	Channel 2
Count input	X000	X001	(Note)
Reset input	X002	X003
Set value	SW18	SW20	Data range: H0000 to HFFFF
Count value	SW22	SW23
Soft-gate	S240	S248	Operation is enabled when ON
Interrupt enable	S241	S249	Interrupt is enabled when ON
Count preset	S243	S24B	Used to preset the counter value

Note) When both channels are used, X000 to X003 cannot be used as normal input devices. However, if either one channel is used, these inputs for unused channel can be used as normal input devices.

Interrupt assignment

Channel 1 ¼ I/O interrupt program #1

Channel 2 ¼ I/O interrupt program #2

Basic Hardware and Function 273

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