ICP DAS USA I-8091 2-axis stepping/servo user manual counter, Quadrant Counting Mode

I-8090 User Manual Version 1.0 06/2001

/SEL=0 (ZCTRL register), the high byte can be read out when set /SEL=1 (ZCTRL register).

Register	Add.	R/W	Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
INDEX	0x04	R						ZI	YI	XI

The index input C+/C- can read out from this register. These bits are active high.

XI : indicate the index of X-axis (C+/C- input).

YI : indicate the index of Y-axis (C+/C- input).

ZI : indicate the index of Z-axis (C+/C- input).

Register	Add.	R/W	Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
XCTRL	0x00	W			S1	S0		/RST	/INH	/SEL
YCTRL	0x01	W			S1	S0		/RST	/INH	/SEL
ZCTRL	0x02	W			S1	S0		/RST	/INH	/SEL

The XCTRL,YCTRL and ZCTRL register are control registers for X-axis, Y-

axis, Z-axis respectively.

/RST : reset counter to zero

/INH : inhibit the counter data latch. This bit must be set 0 before read out the counter value to inhibit the counter data latch to DATA registers.

/SEL : to select low byte or high byte for reading the counter value. 0 : low byte

1 : high byte

S1, S0 : to select counting mode 00 : quadrant counting mode

A

B

counter 1 2 3 4 5 6

Quadrant Counting Mode

Fig(2) Quadrant counting mode

01 : CW/CCW counting mode

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