Freescale Semiconductor i.MX27 PDK 1.0 - Manual (Page 53)

Freescale Semiconductor i.MX27 PDK 1.0 Hardware User's Guide, Rev. 1.0 5-21
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