Hardware Manual ver.1.0.1 Pre1
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5.9. D1/D2 (Status LED)
D1 (green LED) and D2 (red LED) are connected to the CPU (EP9307)’s GPIO (General Purpose I/O),
which allow controlling LED status (the LED connected to the GPIO Port E will function as the status LED
when EP9307’s built-in ROM boots up).
Note: The GPIO signal to be connected to this LED differs depending on board revision. For information
on how to identify board revision, refer to Section 9.1, How to Identify Board Revision.
[Rev.A, Rev.B]
・
D1 (green LED) is connected to the EP9307’s RDLED (Port E: 1) pin.
・
D2 (red LED) is connected to the EP9307’d GRLED (Port E: 0) pin.
[Rev.C or later]
・
D1 (green LED) is connected to the EP9307’s GRLED (Port E: 0) pin.
・
D2 (red LED) is connected to the EP9307’s ROW7 (Port C: 7) pin.
Caution:
The Rev.C or later boards use the EP9307’s RDLED (PortE:1) in the internal circuit.
Never change this setting.
5.10. JP1/JP2 - Boot Mode Selection Jumpers
JP1 and JP2 jumpers are used to select the boot mode on Armadillo-210.
5.10.1. JP1 - Boot ROM Selection Jumper
With JP1 shorted, the system will boot from the on-chip boot ROM. When JP1 is open, the system will
instead load the boot program from the on-board flash memory.
5.10.2. JP2 – Bootloader Mode Selection Jumper
JP2 is used by Hermit-at, the standard bootloader on Armadillo-210. When JP2 is shorted, Hermit-at will
start in interactive mode, displaying a prompt on the serial terminal and then waiting for user input. When
JP2 is open, Hermit-at will directly load Linux without any need for user intervention.
Table 5-11 jumper Setting and Behavior
JP1
JP2
Behavior at Booting
Open
Open
The Linux Kernel in On-board Flash Memory will boot up.
Open
Short
The boot loader “Hermit” command prompt will boot up.
Short
-
The program in On-chip Boot ROM will boot up.
