DEMO9S08QB8 Freescale Semiconductor, DEMO9S08QB8 Datasheet - Page 29

• Manufacturer Part Number: DEMO9S08QB8
• Description: BOARD DEMO FOR 9S08 QB MCU
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of DEMO9S08QB8

• Contents: Board, Cable
• Silicon Manufacturer: Freescale
• Core Architecture: HCS08
• Core Sub-architecture: HCS08
• Silicon Core Number: MC9S08
• Silicon Family Name: S08QB
• Kit Contents: Board
• Rohs Compliant: Yes
• For Use With/related Products: MC9S08QB8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.1.3
7.2
DEMO9S08QB8 User Manual
RS232 Communications
J5 - VDD Source Selection Jumper VDD_SELECT
The DEMO9S08QB8 integrates an RS232 transceiver for the microcontroller
SCI signals. The transceiver operates from 1.8V to 4.25V, and it can be
enabled or disabled via jumper settings or through firmware control. The
DEMO9S08QB8 also integrates the SCI signal into the Embedded Multilink
circuitry. A user can communicate with the microcontroller SCI module via
either the on-board DB9 connector or the Embedded Multilink circuitry. There
are three jumpers associated with SCI communication.
Select the regulator to supply microcontroller VDD. This is the default
setting.
Select the battery pack to supply microcontroller VDD
Select the MCU_PORT to supply microcontroller VDD. This setting
also allows power to be supplied to the target connected to the
MCU_PORT. By default this jumper is installed.
Figure 7-3: VDD_SELECT Option Header (J5)
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