Datasheet TB9120AFTG (Toshiba) - 10
| Manufacturer | Toshiba |
| Description | Bipolar stepping motor driver with a clock input interface for automotive applications |
| Pages / Page | 50 / 10 — TB9120AFTG. 7.6 CW/CCW control circuit. 7.7 Excitation mode setting … |
| File Format / Size | PDF / 3.0 Mb |
| Document Language | English |
TB9120AFTG. 7.6 CW/CCW control circuit. 7.7 Excitation mode setting (DMODE)
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TB9120AFTG 7.6 CW/CCW control circuit
Switches the rotation direction of the stepping motor. When CW/CCW=H, the current in the phase A is output with a phase advance of 90° relative to that in the phase B. When CW/CCW=L, the current in the phase B is output with a phase advance of 90° relative to that in the phase A. CW/CCW input Function H Clockwise (CW) L Counterclockwise (CCW) e.g. when CW/CCW is changed at quarter step resolution: H CLK L H CW/CCW L MO H L +100% +71% +38% Iout(A) 0% -38% -71% -100% +100% +71% +38% Iout(B) 0 % -38% -71% -100% CW CCW CW Timing charts may be simplified for explanatory purposes.
7.7 Excitation mode setting (DMODE)
DMODE0, DMODE1 and DMODE2 switch step resolution. When DMODE 0 = DMODE 1 = DMODE 2 = L, the current setting of the phase A is set to 71% and the current setting of the phase B is also set to 71%. At this time, the L level is output from the MO pin. DMODE0 input DMODE1 input DMODE2 input Function L L L A phase 71%, B phase 71% L L H Full step resolution setting L H L Half step resolution (a) setting L H H Quarter step resolution setting H L L Half step resolution (b) setting H L H 1/8 step resolution setting H H L 1/16 step resolution setting H H H 1/32 step resolution setting © 2020 10 2020-05-12 Toshiba Electronic Devices & Storage Corporation
Switches the rotation direction of the stepping motor. When CW/CCW=H, the current in the phase A is output with a phase advance of 90° relative to that in the phase B. When CW/CCW=L, the current in the phase B is output with a phase advance of 90° relative to that in the phase A. CW/CCW input Function H Clockwise (CW) L Counterclockwise (CCW) e.g. when CW/CCW is changed at quarter step resolution: H CLK L H CW/CCW L MO H L +100% +71% +38% Iout(A) 0% -38% -71% -100% +100% +71% +38% Iout(B) 0 % -38% -71% -100% CW CCW CW Timing charts may be simplified for explanatory purposes.
7.7 Excitation mode setting (DMODE)
DMODE0, DMODE1 and DMODE2 switch step resolution. When DMODE 0 = DMODE 1 = DMODE 2 = L, the current setting of the phase A is set to 71% and the current setting of the phase B is also set to 71%. At this time, the L level is output from the MO pin. DMODE0 input DMODE1 input DMODE2 input Function L L L A phase 71%, B phase 71% L L H Full step resolution setting L H L Half step resolution (a) setting L H H Quarter step resolution setting H L L Half step resolution (b) setting H L H 1/8 step resolution setting H H L 1/16 step resolution setting H H H 1/32 step resolution setting © 2020 10 2020-05-12 Toshiba Electronic Devices & Storage Corporation
