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ManualsBrandsSTMICROELECTRONICS ManualsPMICsPMIC - motor controllers Half-bridge (4) SPI PowerSO 20
20212223242526272829
Functional description L9935
24/29 Doc ID 5198 Rev 10
Table 11. Half step mode control sequences and diagnosis response
SDI SDO Error cases and SDObit7, bit6
Fault
--
A
O
P
E
N
B
O
P
E
N
A1
S
H
O
R
T
VS
A2
S
H
O
R
T
VS
B1
S
H
O
R
T
VS
B2
S
H
O
R
T
VS
A1
(1)
S
H
O
R
T
GND
A2
(1)
S
H
O
R
T
GND
B1
(1)
S
H
O
R
T
GND
B2
(1)
S
H
O
R
T
GND
therm. therm.
alarm
shut down
(reset
operating
codes)
bit 76543210 76543210 76 76 76 76 76 76 76 76 76 76 76 76543210
Command/response
XX111111
XX011111
XX011111
XX011111
XX011011
XX111011
XX010011
XX010111
XX010010
XX110010
XX011010
XX011110
XX011011
XX111011
XX010011
XX010111
XX010010
XX110010
previous code
11111111
11011111
11011111
11011111
11011111
11011011
11111011
11010011
11010111
11110010
11011010
11011110
11011011
11111011
11010011
11010111
11010010
11
11
11
11
11
01
11
11
11
01
11
11
11
01
11
11
11
11
11
11
11
11
11
11
01
11
11
11
01
11
11
11
01
11
11
11
11
11
11
01
01
01
01
01
11
11
01
01
01
01
01
11
01
01
01
01
01
11
11
11
01
01
01
01
01
11
11
11
11
11
11
11
11
11
11
01
01
01
01
01
11
11
11
01
01
11
11
11
11
01
01
01
01
11
11
11
01
01
01
01
01
11
11
10
10
10
10
01
11
11
11
11
10
01
10
01
11
11
11
11
11
11
11
11
11
10
10
10
01
11
11
11
11
10
10
10
11
11
11
11
10
10
10
01
11
11
11
11
10
10
10
01
11
11
11
11
11
11
11
11
11
10
10
10
01
11
11
11
11
10
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
00111111
1. Motor resistance approximately 10 and V
S
= 12V. So a short to ground only is detected on one branch of the bridge.
Lower resistivity of the motor may lead to detection of short to ground on both branches of the bridge leading to code 10 on
all steps.