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Mc68hc908mr32 control board – Motorola M68HC08 User Manual

Page 65

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Hardware Design

All HW Sets Components

DRM028 — Rev 0

Designer Reference Manual

MOTOROLA

Hardware Design

65

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 4-4

shows a block diagram of the board’s circuitry.

Figure 4-4. MC68HC908MR32 Control Board

4.3.1.1 Electrical Characteristics of the MC68HC908MR32 Control Board

The electrical characteristics in

Table 4-1

apply to operation at 25

°C.

OPTOISOLATED

RS-232 I/F

TERMINAL

dc POWER

12 Vdc

REGULATED

POWER SUPPLY

PWM LEDs (6)

FORWARD/REVERSE

SWITCH

START/STOP

SWITCH

SPEED

POT

EMULATOR/

PROCESSOR
CONNECTOR

RESET

SWITCH

(2) OPTION
SWITCHES

OVERCURRENT/

OVERVOLTAGE

INPUTS

PWM (6)

OUTPUTS

CURRENT/TEMP

SENSE INPUTS

MISC. POWER AND

CONTROL I/O

OPTO/POWER DRIVER I/O CONNECTOR

BACK EMF

INPUTS

CONFIG.

JU

MPERS

40-PIN RIBBON

CONNECTOR

INPUT

TACHOMETER

HALL EFFECT

INPUTS (3)

I/F

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Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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