DEMO9RS08LA8 Freescale Semiconductor, DEMO9RS08LA8 Datasheet - Page 10

• Manufacturer Part Number: DEMO9RS08LA8
• Description: BOARD DEMO FOR MC9RSOLA8 MCU
• Manufacturer: Freescale Semiconductor
• Series: RS08r
• Type: MCUr

Specifications of DEMO9RS08LA8

• Contents: Board, Cable, DVD
• Silicon Manufacturer: Freescale
• Core Architecture: RS08
• Core Sub-architecture: RS08
• Silicon Core Number: MC9RS08
• Silicon Family Name: RS08LA
• Kit Contents: Board Cables CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: MC9RS08LA8
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

D E M O 9 R S 0 8 L A 8
J A N U A R Y
2 3 ,
2 0 0 8
U S E R
G U I D E
Figure 5: VX_EN Option Header
ON
OFF
1
2
Enabled
Disabled
VX_EN
CAUTION:
Do not exceed available current supply from USB-BDM or on-board
regulator when sourcing power through connector J1 to external circuitry.
RESET SWITCH
The RESET switch applies an asynchronous RESET to the MCU. The RESET switch is
connected directly to the RESET* input on the MCU. Pressing the RESET switch applies a
low voltage level to the RESET* input. A pull-up bias resistor allows normal MCU operation.
Shunt capacitance ensures an adequate input pulse width.
LOW VOLTAGE RESET
The MC9RSO8LA8 utilizes an internal Low Voltage Detect (LVD) circuit. The LVD holds the
MCU in reset until applied voltage reaches an appropriate level. The LVD also protect against
under-voltage conditions. Consult the MC9RSO8LA8 reference manual for details LVD
operation.
TIMING
The DEMO9RSO8LA8 internal timing source is active from RESET by default. An external 32
kHz XTAL oscillator, is also provided. Refer to the MC9RSO8LA8 Data Sheet for details on
configuring the selected timing source.
COMMUNICATIONS
The DEMO9RSO8LA8 supports serial communications through the integrated USB-BDM and
an on-board, low-voltage, RS-232 transceiver.
The transceiver provides valid RS-232
signaling for input voltage levels down to +1.8V. The COM_SEL header selects the serial path
applied.
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