Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

Hardware Design

All HW Sets Components

through the 40-pin ribbon cable from the optoisolation board or low-voltage power stage.

The control board is designed to run in two configurations. It can be connected to an M68EM08MR32 emulator via an M68CBL08A impedance matched ribbon cable, or it can operate using the daughter board. The M68EM08MR32 emulator board may be used in either an MMDS05/08 or MMEVS05/08 emulation system.

Figure 4-4shows a block diagram of the board’s circuitry.

 

OPTOISOLATED

FORWARD/REVERSE

 

 

SPEED

 

 

SWITCH

 

 

 

 

 

 

POT

TACHOMETER

 

RS-232 I/F

 

 

TERMINAL

START/STOP

 

 

 

INPUT

 

 

 

 

I/F

 

SWITCH

 

 

 

HALL EFFECT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INPUTS (3)

 

 

EMULATOR/

CONFIG.

JUMPERS

RESET

 

 

 

SWITCH

 

 

 

PROCESSOR

 

 

 

 

 

 

 

CONNECTOR

(2) OPTION

 

 

 

 

 

 

 

 

 

 

 

 

SWITCHES

 

 

REGULATED

 

 

 

 

 

dc POWER

POWER SUPPLY

PWM LEDs (6)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12 Vdc

 

OPTO/POWER DRIVER I/O CONNECTOR

 

 

 

 

 

 

 

 

40-PIN RIBBON

OVERCURRENT/

 

 

BACK EMF

CONNECTOR

 

CURRENT/TEMP

 

OVERVOLTAGE

INPUTS

 

SENSE INPUTS

 

 

INPUTS

 

 

PWM (6)

MISC. POWER AND

 

OUTPUTS

CONTROL I/O

 

Figure 4-4. MC68HC908MR32 Control Board

4.3.1.1 Electrical Characteristics of the MC68HC908MR32 Control Board

The electrical characteristics in Table 4-1apply to operation at 25°C.

DRM028 — Rev 0

 

Designer Reference Manual

 

 

 

MOTOROLA

Hardware Design

65

 

For More Information On This Product,

 

 

Go to: www.freescale.com

 

Page 65
Image 65
Motorola M68HC08 manual 4shows a block diagram of the board’s circuitry