DEMO9S08QD4 Freescale Semiconductor, DEMO9S08QD4 Datasheet - Page 6

• Manufacturer Part Number: DEMO9S08QD4
• Description: BOARD DEMO FOR MC9S08QD FAMILY
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of DEMO9S08QD4

• Contents: Board, Cable, CD
• Processor To Be Evaluated: MC9S08QD
• Data Bus Width: 8 bit
• Interface Type: USB
• Silicon Manufacturer: Freescale
• Core Architecture: HCS08
• Core Sub-architecture: HCS08
• Silicon Core Number: MC9S08
• Silicon Family Name: S08QD
• Rohs Compliant: Yes
• For Use With/related Products: MC9S08QD2, MC9S08QD4
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Controlling the Stepper Based on an Input Signal (PWM)
The code can take samples of the duty cycle and determine the percentage of the duty. As shown in
Figure
TPM2CH0I detects in rising-edge and falling-edge of all the changes of the input signal
changes are stored as variables and then are calculated to produce the duty cycle. For details see the
MC9S08QD4 Data Sheet.
Below are the pin definitions described in code:
/*********** Pin definitions *************
6
*****************************************
*
*
*
*
*
*****************************************/
PWM_INPUT
COIL_A1
COIL_A2
COIL_B1
COIL_B2
7, PTA5 can be used with the TPM module configured as input capture. In this mode, the
Driving a Stepper Motor Based on the MC9S08QD4 and Other 8-bit Families, Rev. 0
PTA5/TPM2CH0I/IRQ/RESET
PTA4/TPM2CH0O/BKGD/MS
PTAD5 - Pin 1 *
PTAD0 - Pin 8 *
PTAD1 - Pin 7 *
PTAD2 - Pin 6 *
PTAD3 - Pin 5 *
Figure 8. Input Signal Data Measurements
Figure 7. MC9S08QD4 8-Pin Package
V
V
SS
DD
8-pin Assignment
1
2
3
4
DIP/SOIC
5
8
7
6
PTA3/KBI1P3/TCLK2/ADC1P3
PTA0/KBI1P0/TPM1CH0/ADC1P0
PTA2/KBI1P2/TCLK1/ADC1P2
PTA1/KBI1P1/TPM1CH1/ADC1P1
Freescale Semiconductor
(Figure
8). These