TWR-S08MM128 Freescale Semiconductor, TWR-S08MM128 Datasheet - Page 5

• Manufacturer Part Number: TWR-S08MM128
• Description: TOWER SYSTEM BOARD MC9S08MM128
• Manufacturer: Freescale Semiconductor
• Series: ColdFire®, Flexis™r
• Type: MCUr

Specifications of TWR-S08MM128

• Contents: Board
• Processor To Be Evaluated: 9S08MM128
• Data Bus Width: 8 bit
• Interface Type: USB, CAN
• Silicon Manufacturer: Freescale
• Core Architecture: Coldfire, HCS08
• Core Sub-architecture: Coldfire V1, HCS08
• Silicon Core Number: MCF51, MC9S08
• Silicon Family Name: Flexis - MCF51MM, Flexis - S08MM
• Rohs Compliant: Yes
• For Use With/related Products: Freescale Tower System, MC9S08MM128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.4
An RS232 transceiver on the TWR‐S08MM128 connects to a standard 2x5 pin header (refer to Figure
2). Selection jumpers J15 and J16 allow MC9S08MM128 SCI2 signals to be routed to either the RS232
transceiver or the OSBDM circuit. Refer to Figure 5 for more details.
Alternatively, when assembled as a Tower System, the MC9S08MM128 SCI1 TX and RX are routed to
the SER‐TWR. If the SER‐TWR jumpers are configured to run in RS‐232 mode, the SCI1 TX and the RX
signal can be communicated via the RS232 connector from the TWR‐SER. Please refer to the TWR‐SER
user manual (TWRSERUM) from www.freescale.com/tower for more detail.
3.5
The TWR‐S08MM128 implements an infrared transmit and receive port. The transmit circuit is
implemented with an infrared diode and the user can choose to drive the diode either with IRO or SCI
TX. The receiver is implemented by an infrared transistor and the user can choose to input this signal
to the SCI RX or the ACMP input. Jumpers J9, J25 and J26 are used for routing the connections, refer to
Section 4 to set the jumpers. Please refer to application note AN4116, searchable from
www.freescale.com
3.6
The TWR‐S08MM128 features a 2x10 expansion connector J27 (refer to Figure 3) to MED‐EKG for
routing the medical engine signals to external medical board so it can use the OPAMP, TRIAMP, ADC
and DAC on MC9S08MM128 to implement the requirement signal conditioning for medical
applications.
When the DSC MC56F8006 from the MED‐EKG is enabled, MC9S08MM128 can choose to read the
conditioned EKG results output from the DSC via I2C transmission (pin 3 and pin 4). To enable I2C
communication, you must assemble the MEG‐EKG with the Tower System because the TWR‐SER has
the pulled up resistors circuit required for I2C transmission.
In Figure 3, the bold text highlights the functions that are used to implement the MED‐EKG
demonstration. For detail about the MED‐EKG, please refer to the MED‐EKG user manual, MED‐EKG lab
RS232 Interface
Infrared Port
Medical Connector
Figure 2. RS232 2x5 Pin Header Connections
MC9S08MM128
Not Connected
Not Connected
Signal
TWR‐MC9S08MM128 User Manual
GND
RX2
TX2
1
3
5
7
9
Pin
10 3.3V
2
4
6
8
MC9S08MM128
Not Connected
Not Connected
Not Connected
Not Connected
Signal
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