tb62217afg TOSHIBA Semiconductor CORPORATION, tb62217afg Datasheet - Page 32

• 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

Protection Circuit Dead Band Time
(example in which the reference clock (Osc_M) frequency is 800 kHz)
(2) When the RESET output mask is “0” in the extended setup mode
Stop state in the protection operations listed above
Note: To put protection into effect, the protection circuit must keep operating for at least the time stated above.
DC/DC A DC/DC B DC/DC C
Detected
detected
detected
detected
detected
detected
VSD
Not
Not
Not
Not
Not
Protection
x
x
x
Function
TSD
VSD
ISD
Shut-down = all the functions stop as a failure related to the entire system occurs. They can be restarted
only by initializing using the POR when the VM power is turned on again.
OFF = only the motor block stops operating. It can be restarted by changing the SLEEP signal from high
to low and to high again.
Low Pulse: Low pulses are generated for 40 ms (if OSCM = 800 kHz).
Detected Error and Detection Block
Detected
detected
detected
detected
detected
detected
VSD
Not
Not
Not
Not
Not
DC-DC converter
DC-DC converter
Detected
Block Detected
detected
detected
detected
detected
detected
VSD
Not
Not
Not
Not
Not
Entire IC
Motor
Detected
detected
detected
detected
detected
detected
Motor
ISD
Not
Not
Not
Not
Not
Detected
Protection Mask
Entire IC
detected
detected
detected
detected
detected
No function is
12 to 16CLK
12 to 16CLK
TSD
Not
Not
Not
Not
Not
4 to 8CLK
available
Width
DC/DC A DC/DC B DC/DC C
operation
operation
Normal
Normal
Down
Down
Down
Down
Shut
Shut
Shut
Shut
32
Example: Time for OSCM = 800 kHz
operation
operation
Normal
Normal
Down
Down
Down
Down
Operation State
Shut
Shut
Shut
Shut
15 to 20 P s
15 to 20 P s
operation
operation
5 to 10 P s
Normal
Normal
Down
Down
Down
Down
Shut
Shut
Shut
Shut

operation
Normal
Motor
Down
Down
Down
Down
Shut
Shut
Shut
OFF
Shut
Reset Output Reset Method
L Pulse
Driving the SLEEP pin
H
L
L
L
L
Supplying VM power
Supplying VM power
low or supplying VM
TB62217AFG
Reset Method
power again
2004-11-12
again
again

SLEEP/POR
POR
POR
POR
POR