COBHAM GR740 User Manual

GR740-UM-DS, Nov 2017, Version 1.7 32 www.cobham.com/gaisler
GR740
3.4 Complete signal list
The listing below shows all interface signals, sorted by interface. Some of these signals are located on
shared pins as indicated in the table, therefore some physical pins will map to more than one entry in
this table, with the pin name taken from the primary function of that pin. Section 3.3 and the device
pin assignments in section 40.3 detail the pin sharing.
Table 28. All external signals, before pin sharing
Name Usage Pin sharing Direction Polarity
SYS_RESETN System reset No In Low
SYS_EXTLOCK External clocks locked (for reset genera-
tion), tie high if unused
No In High
SYS_CLK System clock No In -
MEM_EXTCLOCK Alternate clock source for SDRAM inter-
face
No In -
SPW_CLK SpaceWire clock No In Low
PROC_ERRORN Processor 0 error mode indicator No Out-Tri Low
BREAK Debug Support Unit and watchdog/proces-
sor break signal. See description of boot-
strap signals.
No In High
DSU_EN Debug Support Unit enable signal No In High
DSU_ACTIVE Debug Support Unit active signal No Out High
PCIMODE_ENABLE Enables PCI mode. See description of boot-
strap signals
No In High
MEM_CLKSEL Memory interface external clock select sig-
nal
No In -
MEM_IFWIDTH Memory interface width select signal No In -
MEM_CLK_OUT SDRAM clock output No Out -
MEM_CLK_OUT_DIFF_P SDRAM clock output (differential) No Out -
MEM_CLK_OUT_DIFF_N SDRAM clock output (differential) No Out -
MEM_CLK_IN SDRAM clock input No In -
MEM_WEN SDRAM write enable No Out Low
MEM_SN[1:0] SDRAM chip select No Out Low
MEM_RASN SDRAM row address strobe No Out Low
MEM_DQM[11:0] SDRAM data mask See 3.3.2 Out Low
MEM_DQ[95:0] SDRAM data and checkbit bus See 3.3.2 BiDir -
MEM_CKE[1:0] SDRAM interface clock enable No Out High
MEM_CASN SDRAM column address strobe No Out Low
MEM_BA[1:0] SDRAM bank address No Out -
MEM_ADDR[14:0] SDRAM address and chip select 3,2 No Out -
JTAG_TCK JTAG Clock No In -
JTAG_TMS JTAG Mode select No In -
JTAG_TDI JTAG Data in No In -
JTAG_TDO JTAG Data out No Out -
JTAG_TRST JTAG Reset No In -
ETH0_TXER Ethernet port 0, Transmit error No Out High
ETH0_TXD[7:0] Ethernet port 0, Transmitter output data No Out -
ETH0_TXEN Ethernet port 0, Transmitter enable No Out High
ETH0_GTXCLK Ethernet port 0, Gigabit clock No In -

COBHAM GR740 Specifications

General

Brand	COBHAM
Model	GR740
Category	Computer Hardware
Language	English