Stepper Stall Detector (SSDV1) Block Description
MC9S12XHY-Family Reference Manual, Rev. 1.01
700
Freescale Semiconductor
21.1.3
Block Diagram
Figure 21-1. SSD Block Diagram
Coil SINx
Coil COSx
Bus Clock
VDDM
COSxP
COSxM
T1
T2
T3
VSSM
1/2
1/2
1/2
1/8
4:1 MUX
VDDM
T4
VSSM
S1
S3
S2
S4
VDDM
SINxP
SINxM
T5
T6
T7
VSSM
VDDM
T8
VSSM
S5
S7
S6
S8
16-bit accumulator
register
VDDM
VSSM
R2
R2
DFF
16-bit modulus
down counter
R1
C1
+
–
+
–
16-bit load
register
sigma-delta converter
P
A
D
P
A
D
P
A
D
P
A
D
integrator
reference
1/8
2:1 MUX
x = A or B
DAC
(analog)
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