AMIS-30521 Datasheet, PDF (21/26 Pages) AMI SEMICONDUCTOR – Micro-stepping Motor Driver

AMIS-30521 Micro-stepping Motor Driver
Data Sheet
EMC[1:0]
Adjusts the dV/dt of the PWM voltage slopes on the motor pins.
Table 25: SPI Control Parameter Overview EMC[1:0]
Index
EMC[1:0]
Slope (V/µs)
0
0
0
150
1
0
1
100
2
1
0
50
3
1
1
25
Remark
Turn-on and turn-off voltage slope 10% to 90%
“
“
“
SM[2:0]
Selects the micro-stepping mode.
Table 26: SPI Control Parameter Overview SM[2:0]
Index
0
1
2
SM[2:0]
000
001
010
Step Mode
1_/32
1_/16
1_/8
3
011
¼
4
100
½
5
101
½
6
110
Full
7
111
N/A
Remark
Micro-step
Micro-step
Micro-step
Micro-step
Uncompensated half-step
Compensated half-step
Full step
For future use
9.4 SPI Status Register Description
All four SPI status registers have Read Access and are default to "0" after power-on or hard reset.
Table 27: SPI Status Register 0
Address
04h
Content
Access
Reset
Data
Bit 7
R
0
PAR
Status Register 0 (SR0)
Structure
Bit 6
Bit 5
Bit 4
Bit 3
R
R
R
R
0
0
0
0
TW CPfail
-
OPENX
Bit 2
R
0
OPENY
Bit 1
R
0
-
Bit 0
R
0
-
Where:
R
Reset
PAR
TW
Cpfail
OPENX
OPENY
Read only mode access
Status after power-pn or hard reset
Parity check
Thermal warning
Charge pump failure
Open Coil X detected
Open Coil Y detected
Remark:
Data is not latched
Table 28: SPI Status Register 1
Address
05h
Content
Access
Reset
Data
Bit 7
R
0
PAR
Status Register 1 (SR1)
Structure
Bit 6
Bit 5
Bit 4
Bit 3
R
R
R
R
0
0
0
0
OVCXPT OVCXPB OVCXNT OVCXNB
Bit 2
R
0
-
Bit 1
R
0
-
Bit 0
R
0
-
Where:
R
Reset
PAR
OVXPT
OVXPB
OVXNT
OVXNB
Remark:
Read only mode access
Status after power-on or hard reset
Parity check
Over-current detected on X H-bridge: MOTXP terminal, top transistor
Over-current detected on X H-bridge: MOTXP terminal, bottom transistor
Over-current detected on X H-bridge: MOTXN terminal, top transistor
Over-current detected on X H-bridge: MOTXN terminal, bottom transistor
Data is latched
AMI Semiconductor – June 2007, M-20683-001
21
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