PD16814_15 Datasheet, PDF (9/14 Pages) Renesas Technology Corp – MONOLITHIC DUAL H BRIDGE DRIVER CIRCUIT

µPD16814
STEPPING MOTOR EXCITATION TIMING CHART
Inner circumference seek
IN1
IN2
IN3
IN4
Excitation
direction
H1F
<1>
H2F
<2> H1R
<3>
H2R
<4>
H1F
<1> H2F
<2>
H1R
Outer circumference seek
IN1
IN2
IN3
IN4
Excitation
direction
H1F
<4>
H2R
<3> H1R
<2>
H2F
<1>
H1F
<4> H2R
<3>
H1R
• Input signal wave when SEL = LOW (Brake mode)
To set the H bridge in the Brake mode (refer to FUNCTION TABLE), use input signals that set the Brake mode
from IN2 (IN4).
Example 1 From Forward to Brake
IN1/IN3
IN1/IN3
IN2/IN4
F
B
IN2/IN4
F
B
Correct
Example 2 From Reverse to Brake
Incorrect
IN1/IN3
IN1/IN3
IN2/IN4
R
B
IN2/IN4
R
B
Correct
Incorrect
Remark This is because noise may be output due to the configuration of the internal circuit.
7