S5PV210_HARDWARE DESING GUIDE REV 1.0
81
4.2. Booting Option
OM[5:0] pin should be tied with VDDSYS or GND, directly. It is aimed for minimize leakage current when entering the
sleep mode. But if you have to get an option, you should add a pull-up and pull-down resistor with 100K ohms over.
OM[5] OM[4] OM[3] OM[2] OM[1] OM[0]
OM[5]
OM[4]
OM[3]
OM[2]
OM[1]
OM[0]
1'b0
X-TAL
1'b0
1'b1
eSSD
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
1'b1
Nand 2KB, 5cycle
(Nand 8bit ECC)
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
Nand 4KB, 5cycle
(Nand 8bit ECC)
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
1'b1
1'b1
Nand 4KB, 5cycle
(Nand 16bit ECC)
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
OnenandMux
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
1'b1
OnenandDemux
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
SD/MMC
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
1'b1
1'b1
1'b1
eMMC(4-bit)
X-TAL(USB)
1'b0
X-TAL
1'b1
1'b1
Reserved
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
1'b1
Nand 2KB, 4cycle
(Nand 8bit ECC)
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
iROM NOR boot
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1 1'b0
1'b1
1'b1
1'b1
I-ROM
eMMC(8-bit)
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
eSSD
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
1'b1
Nand 2KB, 5cycle
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
Nand 4KB, 5cycle
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
1'b1
1'b1
Nand 16bit ECC
(Nand 4KB, 5cycle)
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
OnenandMux(Audi)
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
1'b1
OnenandDemux(Audi)
X-TAL(USB)
1'b0
X-TAL
1'b0
1'b1
SD/MMC
X-TAL(USB)
1'b0
X-TAL
1'b1 1'b0
1'b1
1'b1
1'b1
1'b1
Boot
Mode
I-ROM
First
boot
UART
->USB
eMMC(4-bit)
X-TAL(USB)
Note) If OM[5] is set to 1, It is used for debug mode that UART boot is first and USB boot is second. UART boot has
some kind of error case. In case of UART error, the iROM boot sequence moves to second USB boot. USB boot also
has some kind of error case like UART. If USB boot is fail, boot sequence move to main memory boot.
Please refer to iROM application note which is more detail about error case.
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