S912XHY128F0VLM Datasheet, PDF (701/802 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

Stepper Stall Detector (SSDV1) Block Description
21.2 External Signal Description
Each SSD signal is the output pin of a half bridge, designed to source or sink current. The H-bridge pins
drive the sine and cosine coils of a stepper motor to provide four-quadrant operation. The SSD is capable
of multiplexing between stepper motor A and stepper motor B if two motors are connected.
Table 21-1. Pin Table¹
Pin Name
Node
Coil
COSxM
Minus
COSx
COSxP
Plus
SINxM
Minus
SINx
SINxP
Plus
1 _{x = A or B indicating motor A or motor B}
21.2.1 COSxM/COSxP — Cosine Coil Pins for Motor x
These pins interface to the cosine coils of a stepper motor to measure the back EMF for calibration of the
pointer reset position.
21.2.2 SINxM/SINxP — Sine Coil Pins for Motor x
These pins interface to the sine coils of a stepper motor to measure the back EMF for calibration of the
pointer reset position.
MC9S12XHY-Family Reference Manual, Rev. 1.01
Freescale Semiconductor
701