Freescale-semiconductor i.MX27 PDK 1.0 Manual de usuario descargar pdf (Pagina 53)

Freescale Semiconductor i.MX27 PDK 1.0 Hardware User's Guide, Rev. 1.0

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5.5 Current Measurement Connector

For this 3-Stack system, measuring the current at various points of the CPU engine and Personality board

is important to device development and power tracking.

The current measurement connector (J3 on the Debug board) is used to determine overall power

management and efficiency. Figure 5-4 displays the J3 Pin-out.

The following areas are monitored:

• CURRENT_MEAS_1: Core Power Supply output from PMIC chip

• CURRENT_MEAS_2: Memory voltage power output from PMIC chip

• CURRENT_MEAS_3: 3.3V power output from PMIC chip

• CURRENT_MEAS_6: 1.8V for external device power supply in

• CURRENT_MEAS_7: 3.3V for HDD power supply in

• CURRENT_MEAS_8: DC power supply in

• CURRENT_MEAS_9: Battery power supply in

5.6 Battery Operation

You can also use an Apple iPod battery or an iPod replacement battery to provide power to the Personality

board. The battery is not included with the 3-Stack system. The CN15 battery connector is compatible with

the iPod battery connector.

Figure 5-3 Current Measurement Connector Pin Out

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Freescale-semiconductor i.MX27 PDK 1.0 Manual de usuario Pagina 53