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2.18
Status LED
A green LED is popu lated on the board at D7 which can be used for any ap pli ca tion spe cific
pur pose. The LED can be turned on in soft ware by writ ing a 1 to I/O port 1EDH. The LED can be turned
off by writ ing a 0 to 1EDH.
2.19
Bat tery Se lect Con trol
An on board 350mAH nomi nal ca pac ity, lith ium bat tery is pro vided for the CMOS Clock/Cal en dar.
A mas ter bat tery en able jumper is pro vided at J10. When J10 is jumpered pins 2-3, bat tery power is
sup plied to the Clock/Cal en dar. When J10 is jumpered pins 1-2, the bat tery is to tally dis con nected and
no cur rent will be drawn from it. Bat tery life is highly de pend ent upon duty cy cle as there is no cur rent
drawn from the bat tery when +5 volts is ap plied to the board. Both stor age and op era tional tem pera tures
play a promi nent fac tor in bat tery life. High tem pera tures will shorten bat tery life sig nifi cantly. J10
must be jumpered 1-2 if a bat tery is not installed.
2.20
DiskOnChip Con figu ra tion
The EBC-LP sup ports the use of M-Systems Disk On Chip (DOC) de vice to be used as Solid State
Disk (SSD) drive. Sec tion 4 of this man ual pro vides the nec es sary in for ma tion for the gen era tion and
us age of the DOC drives. This sec tion docu ments the re quired hard ware con figu ra tions for the DOC
devices. The 32- pin JE DEC mem ory sock et at U17 is used to con tain the DOC de vices used for the disk.
The sili con disk ar ray is mem ory mapped into a 32Kbyte hole at seg ment D000 or D800.
2.20.1
DiskOnChip Enable
The DiskOnChip can be enabled by jumpering J22 and J24 as shown below. The jumper positions
for J22 and J24 are shown on the following page :
Note : J22 is BIOS write, and must be jumpered 1-2 at all times for proper Plug and Play
operation.
Page 2-18
WinSystems - "The Embedded Authority"
J24
2 o
1 o
DiskOnChip Enabled
J22
2 o o 1
4 o o 3
DOC at D000:0000
EBC-LP OPERATIONS MANUAL
J24
2 o
1 o
DiskOnChip Disabled
J22
2 o o 1
4 o o 3
DOC at D800:0000
030530
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