AMIS-30624 AMI Semiconductor, Inc., AMIS-30624 Datasheet - Page 23

• Manufacturer Part Number: AMIS-30624
• Description: I2c Microstepping Motordriver
• Manufacturer: AMI Semiconductor, Inc.

AMIS-30624 I
15.2 Main Control and Register, OTP Memory + ROM
15.2.1. Power-up Phase
The power-up phase of the AMIS-30624 will not exceed 10ms. After this phase, the AMIS-30624 is in shutdown mode, ready to receive
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being loaded with the OTP memory content (see Table 18).
15.2.2. Reset State
After power-up, or after a reset occurrence (e.g. a micro cut on pin VBB has made Vdd go below VddReset level), the H-bridges will be
in high impedance mode, and the registers and flags will be in a predetermined position. This is documented in Table 18 and Table 19.
15.2.3. Soft Stop
A soft stop is an immediate interruption of a motion, but with a deceleration phase. At the end of this action, the register TagPos is
loaded with the value contained in register ActPos to avoid an attempt of the circuit to achieve the motion (seeTable 18). The circuit is
then ready to execute a new positioning command, provided thermal and electrical conditions allow for it.
15.2.4. Thermal Shutdown Mode
When thermal shutdown occurs, the circuit performs a SoftStop command and goes to motor shutdown mode (see Figure 15).
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C messages and execute the associated commands. After power-up, the registers and flags are in the reset state; some of them
AMI Semiconductor – Apr. 2007, Rev 3.1, M-20664-003
www.amis.com
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SWI_Cmp
C Microstepping Motordriver
"R"-Comp
PC20060926.4
DriveHS
DriveLS
ActPos
ESW
Figure 14: Timing Diagram Showing the Change in States for SWI Comparator
R
th
0
Tsw =1024 µ s
Tsw_on = 128 µ s
120 µ s
1
23
512 µ s
1
1
t
t
t
t
t
t
Data Sheet