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Controls and Indicators
the hard-reset configuration word, which is acquired only once after PON-Reset. The loss
includes data stored in the SDRAMs, and the MPC8272 must be re-initialized.
4.1.5
Reset Configuration Switch—SW2
SW2 is a 4-switch dip-switch. For its function see Section 2.2, "Hardware Preparation."
4.1.6
Software Options Switch—SW1
SW1 is a 4-switch dip-switch that is connected over SWOPT(0:2) lines that are available at
BCSR2. S/W options may be manually selected, according to SW1 state. SW1 is factory
set to all ON (see Figure 4-1).
SWOPT0 Pulled to '1'
SWOPT1 Pulled to '1'
SWOPT2 Pulled to '1'
RESERVED
4.1.7
3IDDL Measurement—JP1
JP13 resides in the IDDL main current flow. To measure IDDL, JP13 should be removed
using a solder tool. A current meter should be connected instead with wires that are as short
and thick as possible.
The job of removing JP13 and soldering the current meter
connections instead is very delicate and should be done by a
skilled technician.
If this process is done by unskilled hands or repeated more than
3 times, the MPC8272ADS can be permanently damaged.
4.1.8
Thermal Sense Connector—JP7
Two dedicated pins THERM(0:1) provide a way to take internal temperature measurements
of the MPC8272. These pins should be connected to GND for normal operation. JP7 is
1
2
3
4
SW1
Figure 4-1. SW1 Description
Warning
MPC8272ADS User Guide
SWOPT0 Driven to '0'
SWOPT1 Driven to '0'
SWOPT2 Driven to '0'
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