CSM-12C32 AXIOM, CSM-12C32 Datasheet - Page 7

• Manufacturer Part Number: CSM-12C32
• Description: MCU MODULE
• Manufacturer: AXIOM

Specifications of CSM-12C32

• Silicon Manufacturer: Freescale
• Core Architecture: HCS12
• Core Sub-architecture: S12C
• Features: Power Selection Jumper, Analog Comparator, SCI/SPI Communications Ports
• Kit Contents: Board, Cables, CD, Power Supply
• Silicon Core Number: MC9S12C32
• Silicon Family Name: S12C

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A U G U S T
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U S E R
G U I D E
OPERATION
The CSM12C32 module provides input and output features designed to assist embedded ap-
plication development. Access to MCU port signals is available through module the connector
J1. This connector may also be used to input power to the module or to output power to at-
tached modules. RS-232 communications signals may also be input through connector J1.
Care must be exercised when using the J1 to power the module, as only regulated voltage in
the range of +3.3V to +5V should be supplied to this connection. The on-board regulator pro-
vides a fixed +5V voltage to the module.
Five option jumpers and 3 cut-traces control module operation. Enabling a jumper option re-
quires installing a shunt across the associated header pins. Removing the shunt disables the
associated option. An option enabled by a cut-trace can be disabled by removing the circuit
trace between the cut-trace component pads. Use a sharp knife to cut the embedded circuit
trace. Be careful not to damage adjacent circuitry. To re-enable the option, simply install a
1206 sized 0-ohm resistor or piece of wire across the cut-trace component pads.
Power
Power is supplied to the module through a 2.0mm barrel connector at location PWR for stand-
alone operation. The module may also be powered through connector J1 when connected to
the MCU Project Board. Power may be sourced off-module through connector J1 to external
circuitry. Power routing on the module is determined by the PWR_SEL jumper.
PWR
The PWR connector accepts a 2.1mm, center-positive, barrel plug that allows the module to be
powered from a wall-plug transformer or from a desktop power supply. Input voltage should be
limited to between +7V and +20V. Input voltage of +9VDC is typical. This input supplies the
on-board +5V regulator that powers the module.
Connector J1
Power may be supplied to the module through the pins J1-1 and J1-2. Use of this option re-
quires a regulated voltage input limited to the range of +3.3VDC to +5VDC. This input is con-
nected directly to the module power and ground planes. Care should be exercised not to over-
drive this input. Use of connector J1 to supply +3.3V to the module requires disabling the volt-
age supervisor (LV1) by opening cut-trace CT1. See the Low-Voltage Detect section below.
To re-enable the low-voltage supervisor, install a 1206 sized 0-ohm resistor at CT1.
Connector J1 may also be used to source +5V power from the on-board regulator to external
modules attached to connector J1. The PWR_SEL option header determines how power is
routed to the module.
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