SPEAR320S datasheet(41/113 Pages) STMICROELECTRONICS

Part #	SPEAR320S

Description	Embedded MPU with ARM926 core for industrial and consumer applications

PDF	113 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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SPEAr320S

Pin description

Doc ID 022508 Rev 2

41/113

3.4.5

Boot pins

The status of the boot pins is read at startup by the BootROM.

The H[7:0] pins are user-definable strapping option pins. The values of the pins are latched

at startup and are readable from a register.

3.4.6

GPIOs

The PL_GPIO pins can be used as software-controlled general purpose I/Os if they are not

used by the interfaces of embedded IPs mapped on same pins.

Table 14.

Boot pins description

B3 B2 B1 B0

Boot device

0000

USB Device

0001

Ethernet MII0 (MAC address in I2C non-volatile memory)

0010

Ethernet MII0 (MAC address in SPI non-volatile memory)

0011

Serial NOR Flash (SMI interface)

0100

Parallel 8-bit NOR Flash (EMI interface)

0101

Parallel 16-bit NOR Flash (EMI interface)

0110

Parallel 8-bit NAND Flash (FSMC interface)

0111

Parallel 16-bit NAND Flash (FSMC interface)

1010

UART0

1011

Bypass BootROM and boot from serial NOR Flash (SMI interface)

Other

Reserved

SPEAR320S Datasheet(PDF) 41 Page - STMicroelectronics