STK672-050

No. 5228—7/11

2-6. M4 and M5 (Setting of rotation vector locus at micro-step)

For the current division ratio, see Section 4-3.

2-7. RESET (Reset of entire system)

1. Pin format

sCMOS Schmitt configuration containing the pull-up resistor

(20 k

Ω typical value)

2. Function

sAll circuit states are set to the initial values by setting the RESET signal to the

low state (pulse width of 10

µs or more). At this time, for all modes including

the excitation mode, the A and B phases are set to the origin.

2-8. Vref(Setting of the current value used as the reference of constant current detection)

1. Pin format

sAnalog input configuration

2. Function

sBy applying the voltage of 2.5 V or less of the control system power source

Vcc2, the constant current control can be performed over the excitation current

of the motor at the 100% of the rated current value.

sThe constant current can be controlled in proportional to the Vref voltage with

this value specified as a high limit.

3. Explanation of output pins

4. Functions and timing of output signals

4-1. A, A, B, and B (Output for phase excitation use of motor)

1. Function

sIn four phase two excitation mode, the interval of 3.75

µs (typical value)

is set when the output signals of the phases A and A, B and B change.

4-2. Mo1, Mo2, and MoI (Monitor of excitation state)

1. Pin format

sCMOS standard configuration

2. Function

sOutputs the state of the current phase excitation output.

For the MoI, 0 is output at the origin of each phase.

At other points, 1 is output.

M4

1

0

1

0

M5

1

0

0

1

Mode

Real circle

Œ

Ž

Pin No.

Name

Function

Pin format

19

MoI

Phase excitation origin monitor

CMOS standard configuration

20, 21

Mo1, Mo2

Phase excitation state monitor

CMOS standard configuration

Phase coordinate

A phase

B phase

A phase

B phase

Mo1

1

0

0

1

Mo2

0

1

0

1