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BD63621MUV Folha de dados(PDF) 16 Page - Rohm

Nome de Peças. BD63621MUV
descrição  Stepping Motor Driver
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Fbricantes  ROHM [Rohm]
Página de início  http://www.rohm.com
Logo ROHM - Rohm

BD63621MUV Folha de dados(HTML) 16 Page - Rohm

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2017 ROHM Co., Ltd. All rights reserved.
21.Dec.2020 Rev.002
?ENABLE Switch timing chart (FULL STEP, MODE0=L, MODE1=L)
The switch of the ENABLE signal is reflected by the change in the ENABLE signal with regardless of other input signals.
In the section of ENABLE=L, the motor output becomes OPEN and the electrical angle doesn't advance. Because the
translator circuit stop and CLK input is canceled. Therefore, the progress of
ENABLE=L?H is completed before the input of
ENABLE=L. Excitation mode (MODE0, MODE1) also switches within ENABLE=L interval. Where excitation mode switched
within ENABLE=L interval, restoring of
ENABLE=L?H was done in the excitation mode after switch.
Restoring in the state prior to input of ENABLE=L
?About the switch of the motor excitation mode
The switch of the excitation mode can be done with regardless of the CLK signal at the same time as changing of the signal
MODE0, MODE1. The following built-in function can prevent motor out-of-step caused by discrepancies of torque vector of
transitional excitations during switch between excitation modes. However, due to operation state of motor during switch,
motor may not act following control on IC side of controller, and thereby lead to out-of-step or miss step. Therefore, switch
sequence shall be evaluated sufficiently before any decision.
?Cautions of bidirectional switch of CW_CCW and excitation modes (MODE0, MODE1)
As shown in the figure below, the area between the end of reset discharge
(PS=L?H) and beginning of the first CLK signal
input is defined as interval A, while the area post the end of the first CLK signal input is defined as interval B.
Interval A
=> For CW_CCW, no limitation is applied on switch of excitation mode.
Interval B
In CLK1 period, or within ENABLE=L interval, CW_CCW and excitation mode can?t be switched together.
Violation of this restriction may lead to false step (with one extra leading phase) or out-of-step.
Therefore, in case that CW_CCW and excitation modes are switched simultaneously, PS terminal must be input with
reset signal. Then start to operate in interval A before carrying out such bidirectional switch.
Output off & Translator stop
Interval A
Interval B

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