DEMO9S08SG32AUTO Freescale Semiconductor, DEMO9S08SG32AUTO Datasheet - Page 11

• Manufacturer Part Number: DEMO9S08SG32AUTO
• Description: DEMO BOARD FOR MC9S08SG32
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of DEMO9S08SG32AUTO

• Contents: *
• Processor To Be Evaluated: MC9S08Sx
• Data Bus Width: 8 bit
• Interface Type: RS-232, USB
• Silicon Manufacturer: Freescale
• Core Architecture: HCS08
• Core Sub-architecture: HCS08
• Silicon Core Number: MC9S08
• Silicon Family Name: S08SG
• Kit Contents: Board
• Rohs Compliant: Yes
• For Use With/related Products: MC9S08SG32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

D E M O 9 S 0 8 S H 3 2 / S G 3 2
J U L Y
9 ,
2 0 0 7
U S E R
G U I D E
Figure 3: VX_EN Option Header
ON
OFF
1
2
Enabled
Disabled
VX_EN
CAUTION: Do not exceed available current supply from USB-Multilink 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 MC9S08SH32/SG32 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 MC9S08SH32/SG32 reference manual for
details LVD operation.
TIMING
The DEMO9S08SH32/SG32 is configured to use the target MCU’s internal clock source by
default. Space is provided for an external, 32 kHz XTAL oscillator; however, this timing source
is not populated. The internal timing source is active out of RESET. Default configuration sets
the internal bus to run at 8.4MHz. The internal clock source is trimmable to ± 0.2%. Refer to
the MC9S08SH32/SG32 Data Sheet for further details.
COMMUNICATIONS
The DEMO9S08SH32/SG32 board applies a single Serial Communications Interface (SCI)
port configurable between either SCI or LIN functionality. RS-232 communications are
supported through a DB9 connector. LIN communications are supported through a pair of 4-
pin Molex connectors. A 2x3 option header selects the desired communications protocol.
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