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MPC8349E-mITX-GP Board
Table 9. Lists of Connectors, Jumpers, Switches, and LEDs (continued)
Reference
J19
J21
J22
S3
S5
D1/D2
D8
D9
Description
CPU Power-on reset source jumper. CPU Power-On Reset can be controlled by a hardware MAX811 reset
chip (jumper 2–3 as default).
Real time clock selector. CPU real time clock interrupt request can be selected from DS1339 real time clock,
[ jumper 2–3]. Default is not selected.
Reset configuration word source selection jumpers
Switches
System reset button. Resets the MPC8349E-mITX-GP board.
Power-on push button. Powers up the MPC8349E-mITX-GP board.
LEDs
SW0 and SW1. Controlled by the I2C expander connected to the MPC8349E
USB port power indicator LED. Lights when power is enabled on USB (D8).
3.3 V Active. On means 3.3 V power is good.
1.6
MPC8349E-mITX-GP Board Configuration
This section describes the operational mode and configuration options of the MPC8349-mITX-GP board.
1.6.1
Flash Memory
The Flash memory bank is MX29LV640MTTC-90 top boot Flash memory devices. Each Flash memory
bank has 135 sectors. The first 127 sectors, SA[0–126], are 64 Kbyte, and the last 8 sectors, SA[127–134],
are 8 Kbyte. These last 8 sectors can be write-protected to prevent accidental erasure of the sector content
for applications that may choose to use this protection feature. Table 10 shows the jumper settings to
write-protect sectors SA[127–134] of Flash memory.
Table 10. Flash Memory Write Protect of SA[127–134]
J22.H
Jumper Off
Jumper On
Description
Flash (U7) top sectors are not write protected (WP not asserted).
Flash (U7) top sectors are write protected (WP asserted).
1.6.2
EEPROM
An on-board serial EEPROM allows storage of miscellaneous board-related data. The EEPROM can be
MPC8349E-mITX-GP Reference Design Platform User’s Guide, Rev. 0
20
Preliminary—Subject to Change Without Notice
Freescale Semiconductor
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