Stepper Stall Detector (SSDV1) Block Description
MC9S12XHY-Family Reference Manual, Rev. 1.01
704
Freescale Semiconductor
2
SMS
Stepper Motor Select — This bit selects one of two possible stepper motors to be used for stall detection. See
top level chip description for the stepper motor assignments to the SSD.
0 Stepper Motor A is selected for stall detection
1 Stepper Motor B is selected for stall detection
1:0
STEP
Full Step State — This field indicates one of the four possible full step states. Step 0 is considered the east pole
or 0
°
angle, step 1 is the north Pole or 90
°
angle, step 2 is the west pole or 180
°
angle, and step 3 is the south
pole or 270
°
angle. For each full step state,
Table 21-6
shows the current through each of the two coils, and the
coil nodes that are multiplexed to the sigma-delta converter during conversion or integration mode.
Table 21-4. Transistor Condition States (RTZE = 1)
STEP
ITG
DCOIL
RCIR
T1
T2
T3
T4
T5
T6
T7
T8
xx
1
0
x
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
00
0
0
0
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
00
0
0
1
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
00
0
1
0
ON
OFF
OFF
ON
ON
OFF
ON
OFF
00
0
1
1
ON
OFF
OFF
ON
OFF
ON
OFF
ON
00
1
1
x
ON
OFF
OFF
ON
OFF
OFF
OFF
OFF
01
0
0
0
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
01
0
0
1
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
01
0
1
0
ON
OFF
ON
OFF
ON
OFF
OFF
ON
01
0
1
1
OFF
ON
OFF
ON
ON
OFF
OFF
ON
01
1
1
x
OFF
OFF
OFF
OFF
ON
OFF
OFF
ON
10
0
0
0
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
10
0
0
1
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
10
0
1
0
OFF
ON
ON
OFF
ON
OFF
ON
OFF
10
0
1
1
OFF
ON
ON
OFF
OFF
ON
OFF
ON
10
1
1
x
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
11
0
0
0
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
11
0
0
1
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
11
0
1
0
ON
OFF
ON
OFF
OFF
ON
ON
OFF
11
0
1
1
OFF
ON
OFF
ON
OFF
ON
ON
OFF
11
1
1
x
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
Table 21-3. RTZCTL Field Descriptions (continued)
Field
Description
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