tb62217afg TOSHIBA Semiconductor CORPORATION, tb62217afg Datasheet - Page 11

• Manufacturer Part Number: tb62217afg
• Description: Pwm Drive Stepping Motor Driver / Brush Dc Motor Driver Selectable, Dc-dc Converter And Reset Function Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2-2. Stepping Motor Logic Unit
Function
Sleep
STROBE
This circuit receives step current setting data entered from the DATA pin and transfers it to the subsequent
stage. It is enabled when the SLEEP pin is high. (If the SLEEP pin is low, the IC enters the initial setup or
extended setup mode.)
Once ORT is released, driving the SLEEP pin high puts the IC in a write mode for stepping motor current
control data. Driving the SLEEP pin from high to low and back to high clears any latched motor control data
(to all low).
(with the same functions for both an A-/B-axis pair and a C-/D-axis pair)
DATA
CLK
H
16-bit latch
Current
control
Step current setting data logic circuit and setup logic
(TRQ setting)
16-bit shift register
feedback
Torque
u 2 bits
Current
circuit
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
B unit side
u 2 bits
B unit side
Decay
mixed
decay
timing
Output control circuit
B unit side
Current
u 4 bits
circuit
DA
11
information
B unit side
B-phase
Phase
u 1 bit
A unit side
A unit side
u 2 bits
Decay
mixed
decay
timing
A unit side
Current
u 4 bits
Output control circuit
circuit
DA
information
TB62217AFG
A-phase
Phase
u 1 bit
A unit
side
2004-11-12