Freescale Semiconductor Demonstration Board for Freescale MC9S08SV16 DEMO9S08SV16 DEMO9S08SV16 Benutzerhandbuch
Produktcode
DEMO9S08SV16
D E M O 9 S 0 8 S V 1 6 / F L 1 6
J U N E 5 , 2 0 0 9
U S E R G U I D E
8
POWER
The DEMO9S08SV16/FL16 may be powered from the integrated USB-BDM or from an on-
board voltage regulator and external power connector. The desired power source is selected
using the PWR_SEL option header.
board voltage regulator and external power connector. The desired power source is selected
using the PWR_SEL option header.
For application development and debug, the board may be powered from the integrated USB
BDM. As noted above, total current consumption from this source is limited to 300 mA. A
2.0mm, center-positive, barrel connector (VIN) and on-board regulator supports stand-alone
operation and higher power requirements.
BDM. As noted above, total current consumption from this source is limited to 300 mA. A
2.0mm, center-positive, barrel connector (VIN) and on-board regulator supports stand-alone
operation and higher power requirements.
Power may also be applied to connector J1 or the board may be configured to supply power
from connector J1 to external circuitry.
from connector J1 to external circuitry.
CAUTION:
Damage to the board may result if voltages greater than +5.5V are applied
at connector J1 input.
POWER SELECT
Power may be applied to the board through the integrated BDM circuitry, a 2.0mm barrel
connector, or through connector J1. Power selection is achieved using 2 selection headers:
the PWR_SEL option header and the VX_EN option header.
connector, or through connector J1. Power selection is achieved using 2 selection headers:
the PWR_SEL option header and the VX_EN option header.
PWR_SEL
The PWR_SEL option header allows the user to select power input either from either an
external power source connected to the VIN connector or from the integrated USB-BDM.
Figure 3 below details the PWR_SEL header connections.
external power source connected to the VIN connector or from the integrated USB-BDM.
Figure 3 below details the PWR_SEL header connections.
Figure 3: V_SEL Option Header
PWR_SEL
Enable power to board from integrated BDM
VB
VR1
PWR_SEL
Enable power to board from external power supply
VB
VR1