AMIS30421C4211G ONSEMI [ON Semiconductor], AMIS30421C4211G Datasheet - Page 30

• Manufacturer Part Number: AMIS30421C4211G
• Description: Micro-Stepping Stepper Motor Bridge Controller
• Manufacturer: ONSEMI [ON Semiconductor]

Where: R/W = read and write access, R = read access only
Watchdog Register (WR)
It can also be used to set the short circuit and open coil detection time−out.
Remark: Bit 0 of Watchdog Register should always be ‘0’ (zero)!
Table 8. SPI REGISTER OVERVIEW
Table 9. WATCHDOG REGISTER
Table 10. WATCHDOG REGISTER PARAMETERS
Predriver Register 1
Predriver Register 2
Predriver Register 3
Predriver Register 4
Predriver Register 5
Predriver Register 6
Predriver Register 7
The Watchdog Register is located at address 0x00 and can be used to enable the watchdog and set the watchdog time−out.
OPEN_COIL[1:0]
Parameter
WDT[3:0]
WDEN
Address
0x00
Value
0000
0001
0010
0011
0100
0101
0110
1000
1001
1010
1011
1100
1101
0111
1110
1111
SPI Register
00
01
10
11
0
1
Access
Reset
Data
163.84 ms
20.48 ms
2.56 ms
0.32 ms
Disable
128 ms
160 ms
192 ms
224 ms
256 ms
288 ms
320 ms
352 ms
384 ms
416 ms
448 ms
480 ms
512 ms
Enable
32 ms
64 ms
96 ms
Value
WDEN
Bit 7
R/W
Watchdog Register (WR)
0
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Enables the watchdog
Defines the watchdog time−out period. The watchdog needs
to be re−enabled (WDEN) within this time or WDb−pin is ac-
tivated for t
Defines the open coil detection time−out. If an open coil is
detected for a time longer than OpenTimeOut[1:0], an open
coil (OPEN_X and/or OPEN_Y) will be reported.
Note: Short circuit could trigger open coil detection.
Bit 6
R/W
30
0
Address
POR
0x0C
0x0D
0x0A
0x0B
0x0E
0x0F
0x10
Bit 5
R/W
0
WDT[3:0]
.
Bit 4
R/W
0
Description
Bit 3
R/W
0
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W
OPEN_COIL[1:0]
Bit 2
R/W
1
Abbreviation
Bit 1
R/W
0
PDRV1
PDRV2
PDRV3
PDRV4
PDRV5
PDRV6
PDRV7
Bit 0
R/W
Info
p24
p24
p23
0
−