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ISP: Mean in system programming

Normal Boot

0

Mode Select

IV_MX[6]

IV_MX[5]

IV_MX[4]

IV_MX[3]

IV_MX[2]

IV_MX[1]

Auto Scan (SPI_NOR_X1)

uart-> spi-nor-> spi-nand-> eMMC-> uart…..loop

1

0

1

0

1

-

SPI-NAND

0

1

MX[0]

EMMC_boot

1

1

1

1

1

-

-

-

1

1

1

0

1

-eMMC

-

-

1

1

0

1

1

-

-

EXT. _BOOT

1

1

0

0

1

-ISP

-

USB_ISP (only usb port0)

1

0

1

1

1

-

-

Auto Scan Boot by CA7

uart-> spi-nor-> eMMC ->spi-nand-> SDCard-> uart…..loop

1

0

1

0

1

-

-

-

1

0

0

1

1

-

-

SPI-NOR_BOOT

1

0

0

0

1

-

-

UART_ISP

0

1

1

1

1

-

-

-

0

1

1

0

1

-

-

-

0

1

0

1

1

-

-

SPI-NAND_BOOT

0

1

0

0

1

-

-

SDCARD_ISP

0

0

1

1

1

-

-

-

0

0

1

0

1

-

-

-

0

0

0

1

1

-

-

Auto Scan Boot by A926

uart-> spi-nor-> eMMC ->spi-nand-> SDCard-> uart…..loop

0

0

0

0

1

-

-

Table 4. Bootstrap mode select

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