TWR-12311-EU Freescale Semiconductor, TWR-12311-EU Datasheet - Page 21

• Manufacturer Part Number: TWR-12311-EU
• Description: Development Boards & Kits - Other Processors Tower Mod for Europe
• Manufacturer: Freescale Semiconductor

Specifications of TWR-12311-EU

• Rohs: yes
• Product: Development Systems
• Tool Is For Evaluation Of: MC12311
• Core: HCS08
• Interface Type: SPI, USB
• Operating Supply Voltage: 3.5 V to 10 V
• Data Bus Width: 8 bit
• For Use With: MC12311

3.3.1
The 12311-MRB power management circuit is shown in
Power to the 12311-MRB can be configured in several ways and the circuit has the following features:
Table 3-2
Freescale Semiconductor
•
•
•
•
Board can be supplied through the IO headers (V_BRD)
Board can be supplied from an external DC supply (J6)
— The external supply can be unregulated (V_UNREG) and make use of the onboard 3.3 V LDO
— The external supply voltage can be used directly without use of the LDO
8-Pin 2x4 header J13 provides means to supply current to various board components and also
measure current if desired
Green LED D1 is available as a power indicator.
shows the header configuration information for the various power supply modes.
regulator
Power Management
•
•
•
The Freescale TWR-RF development boards generate the system power
supply on the motherboard and supply the voltage to the 12311-MRB
through the V_BRD pin of Headers J2 and J3. In this mode, the current
flows to the 12311-MRB through the pins.
If an external supply is used via 12311-MRB header J5, current flows to
the motherboard through the V_BRD pin of Headers J2 and J3. THE
MOTHERBOARD SUPPLY SHOULD NOT BE USED.
In all modes, the IO voltage supply of peripherals on a motherboard
must be the same voltage as V_BRD, which is also the voltage applied
to the IC MC1213x.
12311 Development Hardware Reference Manual, Rev. 0.0
Figure 3-8. 12311-MRB Power Management Circuit
NOTE
Figure
3-8.
12311-MRB
3-9