
Jumper descriptions
UM1585
Doc ID 023872 Rev 1
13 Jumper
descriptions
The board has the following jumpers for settings or measurements:
Table 23.
List of board jumpers
Jumper
Description
J23 (4)
M25P64 (U1) nCS select (default 1-2 closed: 3-4 closed)
JP1 (3)
SAFHV antifuse (OTP) cell power supply VDD2V5 (default closed 1-2)
JP2 (3)
NAND FLASH VDD (default 1-2 closed = 3.3 V)
JP3 (3)
NAND FLASH SPEAr I/O (default 1-2 closed = 3.3 V)
JP4 (2)
On-board NAND FLASH (U4) closed = enabled
JP5 (3)
MIPHY (U5) VDD_IO (default 1-2 closed = 3.3 V)
JP6 - JP11 (3+3)
GIGA PHY STRAP13
JP7 - JP12 (3+3)
GIGA PHY STRAP10
JP8 - JP13 (3+3)
GIGA PHY STRAP9
JP9 - JP14 (3+3)
GIGA PHY STRAP8
JP10 - JP15 (3+3)
GIGA PHY STRAP7
JP16 (3)
SPEAr GMII I/F VDD (default 1-2 closed = 3.3 V)
JP17 (3)
GMII_COL. (default 1-2 closed = pull up)
JP18 (3)
MII_TXCLK_SEL1 (default 2-3 closed)
JP19 (3)
CRS_RGMII_SEL0 (default 2-3 closed)
JP23 (2)
Power OFF LM2731 (U7) (default open)
JP24 (2)
Connect SPEAr_VDD2V5 to MIPHY_VDD2V5_PLL (default open)
JP27 (3)
MIPHY_VDD1V2 (default 1-2 closed)
JP28 (3)
A2D_PLL_VDD2.5 (default 1-2 closed = internal regulator)
JP29 (3)
USB_VDD2V5. (default 1-2closed = internal regulator)
JP30 (2)
SPEAr_DDR3_1V2 (default closed)
JP31 (2)
SPEAr_VDD1V2 (default closed)
JP32 (2)
SPEAr_DDR3_1V5 (default closed)
JP33 (2)
SPEAr_VDD2V5 (default closed)
JP34 (2)
SPEAr_VDD3V3 (default closed)
JP37 (2)
SS_nINH, Power off L5989 (U21) (default open)
JP39 (2)
RTC_VDD1V5 (default closed)
JP42
GIG PHY Ethernet power selection (default 1-2 closed = 3.3 V)
JP44 (3)
RTC Power Selection (default 1-2 closed)