Expansion connector

UM0804

14/25

Doc ID 16303 Rev 2

7.2

Switch 3

Note:

When DIP switch SW3-X is in the ON position, the bit value is 0. When the DIP switch is in

the OFF position, the bit value is 1

8

Expansion connector

An expansion connector (J12 on bottom side) is provided for a companion board. The

manufacturer is Tyco Electronics and the Part Number is 2-5767004-4

The following signals are available on this connector:

●

+5 V

●

GND

●

All the PL_GPIO signals

●

The four PL_CLK signals

●

Host0_DP and DM

8.1

Board schematic

The board schematic is available on www.st.com/spear.

Table 5.

Switch 3 (strapping options)

Boot from

SW3-1

SW3-2

SW3-3

SW3-4

USB_BOOT

0000

ETH (parameter from SPI ROM)

0001

ETH (parameter from I2C ROM)

0010

Serial NOR (default setting)

0011

Parallel NOR 8

0100

Parallel NAND 8

0101

Parallel NOR 16

0110

Parallel NAND 16

0111

SPI_BOOT

1000

UART_BOOT

1001

I2C_BOOT

1010