AMIS30623C623BRG Datasheet, PDF (21/61 Pages) ON Semiconductor – Micro-stepping Motor Driver

DriveHS
AMIS−30623
Tsw = 1024 ms
640 ms
t
Tsw_on = 128 ms
DriveLS
t
“R”−Comp
R_th
t
SWI_Cmp
120 ms
t
ESW
0
1
1
1
t
ActPos
t
Figure 13. Simplified Timing Diagram Showing the Change in States for SWI Comparator
Main Control and Register, OTP memory + ROM
Power−up Phase
Power−up phase of the AMIS−30623 will not exceed
10 ms. After this phase, the AMIS−30623 is in standby
mode, ready to receive LIN messages and execute the
associated commands. After power−up, the registers and
flags are in the reset state, while some of them are being
loaded with the OTP memory content (see Table 19: RAM
Registers).
Reset
After power−up, or after a reset occurrence (e.g. a
micro−cut on pin V_BB has made V_DD to 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 19: RAM Registers and
Table 20: Flags Table.
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>, see Table 19: Ram Registers). The
circuit is then ready to execute a new positioning command,
provided thermal and electrical conditions allow for it.
Sleep Mode
When entering sleep mode, the stepper−motor can be
driven to its secure position. After which, the circuit is
completely powered down, apart from the LIN receiver,
which remains active to detect a dominant state on the bus.
In case sleep mode is entered while a motion is ongoing, a
transition will occur towards secure position as described in
Positioning and Motion Control provided <SecPos> is
enabled. Otherwise, <SoftStop> is performed.
Sleep mode can be entered in the following cases:
• The circuit receives a LIN frame with identifier 0x3C
and first data byte containing 0x00, as required by LIN
specification rev 1.3 and <SleepEn> bit = 1. See also
Sleep in the LIN Application Command section.
• In case the >SleepEn> bit = 1 and the LIN bus remains
inactive (or is lost) during more than 25000 time slots
(1.30 s at 19.2 kbit/s), a time−out signal switches the
circuit to sleep mode.
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