
User Manual BCM91250A
05/18/04
Broadcom Corporation
Document 91250A-UM100-R Connectors Page 9
Table 1 shows BCM91250A connectors.
Note: For the nonstandard connectors which have their pins described below you can locate pin
1 on the board by finding the arrow that points to it on the PCB silkscreen. In some cases for
connectors with multiple rows and columns of pins, the pin numbers at the corners of the
connector are written on the PCB silkscreen.
Table 1:
Connector Descriptions
Board ID Description
J8 DDR SDRAM DIMM slot, MC channel 0, slot 0 (CS 0/1)
J9 DDR SDRAM DIMM slot, MC channel 0, slot 1 (CS 2/3)
J10 DDR SDRAM DIMM slot, MC channel 1, slot 0 (CS 0/1)
J11 DDR SDRAM DIMM slot, MC channel 1, slot 1 (CS 2/3)
J12 10/100/1000 Ethernet MAC0
J13 10/100/1000 Ethernet MAC1
J15 3.3V, 32b PCI slot, BCM1250 PCI device 5
J16 3.3V, 32b PCI slot, BCM1250 PCI device 6
J17 Dual stack USB ports
J26 3.3V, 64b PCI slot, SP1011 PCI device 0
J27 SP1011 SMBus (pin 1 = GND, pin 2 = SROM_SDA, pin 3 = SROM_SCL)
J28 HyperTransport socket for motherboards (see Table 2 on page 10)
J29* HyperTransport header for daughtercards (see Table 2 on page 10)
J30 ROM Emulator connector (see Table 3 on page 12)
J33 Audio codec line in
J34 Audio codec line out
J35 IDE hard disk connector. Please see “IDE Connector (J35) Pin 20 Rework” on page 13 for
more details.
J36 PCMCIA card connector
J38 DEBUG_L trigger for scope (pin 1= GND, pin 2 = DEBUG_L)
J39 BCM1250 EJTAG connector
J41 External Cold Reset switch connector (pin 1 = GND, pin 2 = COLDRES_L)
J42 External Warm Reset switch connector (pin 1 = GND, pin 2 = WARM_RESET_L)
J44 External NMI (GPIO 3) switch connector (pin 1 = GND, pin 2= NMI_L)
J45 External System Reset switch connector (pin 1 = GND, pin 2 = SYS_RESET_L)
J46 2.5V supply sense (pin 1 = GND, pin 2 = 2.5V)
J48 1.25V supply sense (pin 1 = GND, pin 2 = 1.25V)
J49 ATX power connector
J50 Bench supply connector (pin 1 = GND, pin 2 = 3.3V, pin 3 = 5V, pin 4 = ATX 5V Standby)
J51 1.2V supply sense (pin 1 = GND, pin 2 = 1.2V)
J52 1.2V core supply sense (pin 1 = GND, pin 2 = 1.2V)
J53 3.3V, 64b PCI slot, SP1011 PCI device 1
J55 S-Video input
J56 RCA video input
* = a connector located on the bottom of the board.