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When power is applied to the EVB, five green LED’s adjacent to the voltage regulators show the presence of the supply
voltages as follows:
Table 4. Power status LEDs
BOARD
REFERENCE
DESCRIPTION
MAC57D5MB
DS2
Indicates that the 12 V is connected to the EVB correctly.
DS4
Indicates that the 5 V switching regulator is enabled and
working correctly.
DS3
Indicates that the 3.3 V switching regulator is enabled and
working correctly.
DS5
Indicates that the 1.25 V switching regulator is enabled and
working correctly.
DS1
Indicates that the TFT Display – switching regulator is
enabled and working correctly.
MAC57D5-208DC
MAC57D5-506DC
DS1
Indicates that the 1.8 V switching regulator is enabled and
working correctly.
DS2
Indicates that the 0.9 V switching regulator is enabled and
working correctly.
If no LED’s are illuminated when power is applied to the EVB and the regulators are correctly enabled using the appropriate
jumpers, it is possible that either power switch SW1 is in the “OFF” position or some jumper is missed, please refer to
MCU
power supply jumpers
.
6 MCU power supply jumpers
Table 5. MCU power supply jumpers
BOARD
REFERENCE
POSITION
PCB
LEGEND
DESCRIPTION
MAC57D5-208DC
J2
1-2 (Default)
5.0 V switching regulator output is routed to
VDDEH_ADC_MCU and VDDA_MCU (MCU)
2-3
3.3 V switching regulator output is routed to
VDDEH_ADC_MCU and VDDA_MCU (MCU)
REMOVED
VDDEH_ADC_MCU and VDDA_MCU are not
powered (disabled).
J1
1-2 (Default)
5.0 V switching regulator output is routed to
VDDM_SMD_MCU (MCU)
2-3
3.3 V switching regulator output is routed to
VDDM_SMD_MCU (MCU)
REMOVED
VDDM_SMD_MCU is not powered (disabled).
MAC57D5-516DC
J21
1-2 (Default)
3.3 V switching regulator output is routed to
VDDE_A_MCU (MCU)
REMOVED
VDDE_A_MCU is not powered (disabled).
J22
1-2 (Default)
3.3 V switching regulator output is routed to
VDDE_B_MCU (MCU)
Table continues on the next page...
MCU power supply jumpers
MAC57D5xx Customer Evaluation Boards, Rev. 0, 05/2016
Freescale Semiconductor, Inc.
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