DEMO908QB8 Datasheet DEMO908QB8 | P7-P9

DEMO908QB8 MARCH 18, 2005

Table 1: Run Mode Setup

PWR_SEL Pin2 – Pin3 (PWR)

COM_SEL Pin1 – Pin3 (COM)

Pin2 – Pin4

VX_EN As Required

USER_EN As Required

USB-MON08 All jumpers removed

4. Apply power to the board. Loaded application will begin to execute.

MON08 Mode

MON08 Debug Mode supports application development and debug using the internal HC08

monitor. MON08 mode is available to the user using the integrated USB-MON08 or the by

using an external USB-MON08 cable. Use of the integrated MON08 cable requires only a host

PC with an available USB port and an A/B USB cable. A 16-pin MON08 header supports the

use of an external MON08 cable. The steps below describe using the integrated USB-MON08.

1. Connect COM port serial communication cable between board and host PC if needed for

the application. Launch supporting host communication software as needed.

2. Connect auxiliary equipment to board as required by application.

3. Install and launch CodeWarrior Development Studio for HC(S)08, P&E PKG08Z tool set, or

other software capable of communicating with the HC08 MCU.

4. Configure the board option jumpers for MON08 mode.

Table 2: MON08 Mode Setup

PWR_SEL Pin1 – Pin2 (VB)

COM_SEL Pin1 – Pin3 (COM)

Pin2 – Pin4

VX_EN As Required

USER_EN 1 – 4 As Required

5 & 6 Not Installed

USB-MON08 All jumpers installed

NOTE: For use with an external MON08 cable, remove all USB-MON08 jumpers

5. Connect the supplied USB cable between an available USB port on the host PC and the

USB connector on the board.

6. Hosting development software will establish MON08 communication.

SOFTWARE DEVELOPMENT

Software development will require the use of an HC08 assembler or compiler and a host PC

operating a MON08 debug interface. Supplied with this board is the CodeWarrior Develop-

DEMO908QB8 MARCH 18, 2005

ment Studio for HC(S)08 along with the Axiom MON08 IDE for Windows for Debugging and

Flash programming.

A powerful source code generation tool called DriveWay™ is also provided on the support CD.

This can generate C source code for the HC08 microcontroller peripherals, based on setup.

See the DriveWay

™

readme.txt file for more information.

MEMORY MAP

The table below shows the MC68HC908QB8 memory map. Accessing reserved memory lo-

cations will produce unpredictable results. Accessing unimplemented locations will produce an

illegal-address reset.

Table 3: Memory Map

0x0000 –

0x003F

I/O Registers 64

bytes

0x0040 –

0x013F

RAM 256

bytes

0x0140 –

0x27FF

Unimplemented 9920

bytes

0x 2800 –

0x2A1F

Auxiliary ROM 544

bytes

0x2A20 –

0x2F7D

Unimplemented 1374

bytes

0x2F7E –

0x2FFF

Auxiliary ROM 130

bytes

0x3000 –

0xDDFF

Unimplemented 44,544

bytes

0xDE00 –

0xFDFF

Flash Memory 8192

bytes

0xFE00 –

0xFF7D

Status, Control, Monitor ROM 432

bytes

0xFF7E –

0xFFAF

Unimplemented 50

bytes

0xFFB0 -

0xFFFF

Flash, Flash Protect, Osc Trim, Vectors 80

bytes

NOTE: Accessing reserved memory locations can have unpredictable results

NOTE: Accessing unimplemented memory locations will cause an illegal-address reset.

DEVELOPMENT SUPPORT

Application development and debug for the target MC68HC908QB8 is supported through the

MON08 Debug interface. The debug interface consists of an integrated USB-MON08 debug-

ger and an optional 16-pin header (MON08). The MON08 header is not installed in default

DEMO908QB8 MARCH 18, 2005

configuration and may be installed by the user if necessary. Note that when using an external

MON08 cable, all jumpers on the USB-MON08 ENABLE header must be removed.

Integrated MON08

The DEMO908QB8 board features an integrated USB-MON08 debugger from P&E Microcom-

puter Systems. The integrated debugger supports application development and debugging via

the internal monitor. All necessary signals, including high-voltage, clock, data, and configura-

tion signals, are provided by the integrated debugger. A USB, type B, connector provides

connection from the target board to the host PC.

The integrated debugger provides +5V power and ground to target board eliminating the need

to power the board externally. Power from the USB-MON08 is derived from the USB bus;

therefore, total current consumption for the target board, and connected circuitry, must not ex-

ceed 500mA. Excessive current drain will violate the USB specification. Damage to the host

PC USB hub or the target board may result.

A 16-pin header (USB-MON08 ENABLE) allows disconnecting the integrated debugger from

the target board. This allows the stand-alone operation of the target board. In stand-alone

operation, the target board must be power from connector J1 or the PWR connector. The Ta-

ble below details the function of the USB-MON08 Enable header.

Table 4: USB-MON08 Enable Header

Jumper On Jumper Off Signal

J 14 13

Enabled Disabled VB (V out)

I 12 11

Enabled Disabled PTA3/RST*

F 10 9

Enabled Disabled PTA1/TCH1

E 8 7

Enabled Disabled PTA4/OSC2

D 6 5

Enabled Disabled PTA0/TCH0

C 4 3

Enabled Disabled PTA5/OSC1

B 2 1

Enabled Disabled PTA2/IRQ*

NOTE: To use the board in stand-alone operation when powered from the USB cable, remove

the shunt at position “B”. Otherwise the MCU will be forced into monitor mode out of re-

set.

Communications over the USB bus is controlled by the USB_SPEED header. When shipped

from the factory, the DEMO908QB8 is configured for high-speed operation. If the user en-

counters a communication failure, USB communication speed may be reduced by setting this

option jumper to Full.

Figure 1: USB_SPEED Option Header

USB_SPEED Configuration:

HIGH

1 2 3

FULL

1 – 2: Selects USB High-speed communications

2 – 3: Selects USB Full-speed communications

CAUTION: Do not allow current drain to exceed 500mA when

powered from the USB-MON-08 BDM

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21

DEMO908QB8

Mfr. #:

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Development Boards & Kits - S08 / S12 HC908QB8 DEM BOARD

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