AMIS-30624 Datasheet, PDF (25/56 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

AMIS-30624 I²C Microstepping Motordriver
Data Sheet
15.2.6. Battery Under-voltage Management
The AMIS-30624 monitors the battery voltage by means of one threshold and one shutdown level, as illustrated in Figure 16. The only
condition necessary to reset flags <UV2> and <StepLoss> is to recover a battery voltage higher than UV1 and to receive a
GetFullStatus1 command.
- <UV2> = '0'
- <Steploss> = '0'
NORMAL
VOLTAGE
Vbb > UV1
& I²C frame
<GetFullStatus1>
Vbb < UV2
No Motion
Vbb > UV1
& I²C frame
<GetFullStatus1>
Vbb < UV2
& Motion Ongoing
- <UV2> = '1'
- <Steploss> = '0'
- Motor Shutdown
STOP
MODE
2
- <UV2> = '1'
- <Steploss> = '1'
- HardStop
- Motor Shutdown
STOP
MODE
1
Figure 16: State Diagram Battery Voltage Management
PC20060926.5
15.2.7. OTP Register
15.2.7.1. OTP Memory Structure
Table 16 shows where the parameters to be stored in the OTP memory are located.
Table 16: OTP Memory Structure
Address
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0x00
OSC3
OSC2
OSC1
OSC0
IREF3
IREF2
IREF1
IREF0
0x01
TSD2
TSD1
TSD0
BG3
BG2
BG1
BG0
0x02
AbsThr3
AbsThr2
AbsThr1
AbsThr0
PA3
PA2
PA1
PA0
0x03
Irun3
Irun2
Irun1
Irun0
Ihold3
Ihold2
Ihold1
Ihold0
0x04
Vmax3
Vmax2
Vmax1
Vmax0
Vmin3
Vmin2
Vmin1
Vmin0
0x05
SecPos10
SecPos9
SecPos8
Shaft
Acc3
Acc2
Acc1
Acc0
0x06
SecPos7
SecPos6
SecPos5
SecPos4
SecPos3
SecPos2
0x07
DelThr3
DelThr2
DelThr1
DelThr0
StepMode1 StepMode0
LOCKBT
LOCKBG
Parameters stored at address 0x00 and 0x01 and bit LOCKBT are already programmed in the OTP memory at circuit delivery. They
correspond to the calibration of the circuit and are just documented here as an indication.
Each OPT bit is at ‘0’ when not zapped. Zapping a bit will set it to ‘1’. Thus only bits having to be at ‘1’ must be zapped. Zapping of a bit
already at ‘1’ is disabled.
Each OTP byte will be programmed separately (see command SetOTPparam).
Once OTP programming is completed, bit LOCKBG can be zapped, to disable future zapping, otherwise any OTP bit at ‘0’ could still be
zapped by using a SetOTPparam command.
Table 17: OTP Overwrite Protection
Lock Bit
LOCKBT (factory zapped before delivery)
LOCKBG
Protected Bytes
0x00 to 0x01
0x00 to 0x07
Note:
Zapped bits will really be “active” after a GetOTPparam or a ResetToDefault command or after a power-up.
AMI Semiconductor – Apr. 2007, Rev 3.1, M-20664-003
25
www.amis.com