Freescale Semiconductor Evaluation, Demonstration and Development Board for MC9S08MM128 TWR-S08MM128 TWR-S08MM128 Benutzerhandbuch
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TWR-S08MM128
TWR‐MC9S08MM128 User Manual
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2 Reference Documents
latest revision of all Tower System documentation.
• TWR‐S08MM128 Schematics
• TWR‐S08MM128 Quick Start Guide
• TWR‐S08MM128‐KIT Lab Tutorial
• MC9S08MM128 Reference Manual
• MC9S08MM128 Data Sheet
• AN3561, USB Bootloader for the MC9S08JM60
• TWR‐S08MM128 Quick Start Guide
• TWR‐S08MM128‐KIT Lab Tutorial
• MC9S08MM128 Reference Manual
• MC9S08MM128 Data Sheet
• AN3561, USB Bootloader for the MC9S08JM60
3 Hardware Features
This section provides more details about the features and functionality of the TWR‐S08MM128.
3.1
Clocking
Two crystals are provided on the board for clocking the MC9S08MM128 device:
1. A 16 MHz crystal connected to XTAL2 and EXTAL2 for system clocking
2. A 32.768kHz crystal connected to XTAL1 and EXTAL1 for TOD usage
2. A 32.768kHz crystal connected to XTAL1 and EXTAL1 for TOD usage
3.2
System Power
The TWR‐S08MM128 can be powered by the Open Source BDM (OSBDM) circuit via the Mini‐B USB
connector when stand‐alone. When assembled with the Tower System and the TWR‐SER is configured
to run USB device mode (J16 pin 3 and 4 connected), the Mini‐B USB connector is no longer used as a
power source and only used for OSBDM debugging purposes. In this case, the power will be supplied
from the Mini‐B USB from the TWR‐SER. Please plug in the Mini‐B USB connector from TWE‐SER before
plugging in the Mini‐B USB connector from TWR‐S08MM128.
A standard USB A male to Mini‐B male cable (provided) can be used to supply power from a USB host
or powered USB hub. Optionally, an AC to DC adapter with a USB A female receptacle (not provided)
can be used as the power source.
A jumper, J11, can be used to isolate the 3.3V supply from the microcontroller. This connection can be
used to measure the power usage of the MC9S08MM128 microcontroller.
connector when stand‐alone. When assembled with the Tower System and the TWR‐SER is configured
to run USB device mode (J16 pin 3 and 4 connected), the Mini‐B USB connector is no longer used as a
power source and only used for OSBDM debugging purposes. In this case, the power will be supplied
from the Mini‐B USB from the TWR‐SER. Please plug in the Mini‐B USB connector from TWE‐SER before
plugging in the Mini‐B USB connector from TWR‐S08MM128.
A standard USB A male to Mini‐B male cable (provided) can be used to supply power from a USB host
or powered USB hub. Optionally, an AC to DC adapter with a USB A female receptacle (not provided)
can be used as the power source.
A jumper, J11, can be used to isolate the 3.3V supply from the microcontroller. This connection can be
used to measure the power usage of the MC9S08MM128 microcontroller.
3.3
Debug Interface
An on‐board, MC9S08JM60 based OSBDM circuit provides a debug interface to the MC9S08MM128. A
standard USB A male to Mini‐B male cable (provided) can be used for debugging via the USB connector,
J17. Refer to Section 6 for information on other modes of operation of the OSBDM.
standard USB A male to Mini‐B male cable (provided) can be used for debugging via the USB connector,
J17. Refer to Section 6 for information on other modes of operation of the OSBDM.