Net5501 Interfaces

From Soekris Info Wiki

The Soekris 5501 board has been shipping since the summer of 2007, yet as of this writing (February 2008), there is no manual for it. Unfortunately, the hardware is different from the predecessor, the 4801 board. The best reference for the 5501 is still the 4801 hardware manual from Soekris; this web page documents slight differences between the 5501 and the 4801, concentrating on the area of external interfaces. Cortex systems has a high resolution image of the 5501 on their web site.

In the following, all references are seen from the TOP of the board. The "front" is defined as the side with the LEDs, the "back" the side with the four Ethernet connectors; this means that the "right" of the board is the side with the PCI connector, and the "left" the side with the power and GPIO connectors.

All TODO items are in italics.

TODO: Many connectors in the following list are actually known, but I don't happen to have the complete documentation with me. So I'll document what I can find right now, and add the rest later.

Connectors

J1 - (P)ATA: 2.5" (P)ATA connector for laptop style disks. Located behind the four green leds on the front. Pin one is away from CF connector, marked by white arrown in silk-print.

J2 - PCI connector: 3.3V PCI cards only. If you card does not fit with the component side upwards, your card is 5V and does not fit. Do not try anyway.

J3 - Mini PCI connector: 3.3 V PCI.

J4 - PCI riser: (not released yet). Center right, parallel to the PCI connector: very large 2-row 2mm header.

J5 - DC Input Jack: The 2.1mm DC Power Jack should be used for connecting a small wall mount unregulated power adapter, supplying 6V-28V DC at 15 VA, with a 5.5mm outside, 2.1mm inside female power plug with plus at center pin. It is protected against reverse polarity. Please note that standard unregulated power transformers can supply much higher voltage that the specified nominal voltage, so when using such a type it’s recommended to use one that is specified for 16V DC or less.

J6 - SATA connector: Near the front, right behind the red LED.

Jumpers

JP1 - Factory use: Front right corner, right next to the front edge of the PCI connector: 14-pin 0.100" 2-row header.

JP2 - CF socket: Compact Flash.

JP3 - Factory use: Center left, right behind the large CPU chip, 7-pin single-row 0.100" header.

JP4 - COM2 serial port
DB9 Pin	Function	Pin	Pin	Function	DB9 Pin
1	DCD	1	2	DSR	6
2	RXD	3	4	RTS	7
3	TXD	5	6	CTS	8
4	DTR	7	8	RIN	9
5	GND	9	10	+5 V Pwr	--
Common db9 connector

JP4 - COM2 serial port: Shrouded 10-pin 2-row 0.100" header (pictured below). Pin 1 is towards the CF socket and labeled by "Pin1" text in silk-print.

JP5 - GPIO
PC87366 Pin	Function	Pin	Pin	Function	PC87366 Pin
--	+3.3V Power	1	2	+5V Power	--
GPIO 20, 117	GPIO 0	3	4	GPIO 1	GPIO 21, 118
GPIO 22, 119	GPIO 2	5	6	GPIO 3	GPIO 23, 120
GPIO 24, 121	GPIO 4	7	8	GPIO 5	GPIO 24, 122
GPIO 26, 123	GPIO 6	9	10	GPIO 7	GPIO 26, 124
--	GND	11	12	GPIO 8	GPIO 4, 6
GPIO 5, 7	GPIO 9	13	14	GND	--
GPIO 13, 55	GPIO 10	15	16	GPIO 11	GPIO 12, 54
--	GND	17	18	RXD	SIN 2, 105
SOUT 2, 107	TXD	19	20	GND	--
All the JP5 GPIO pins provide 3.3V out and are 5V input tolerant.

JP5 - GPIO / User IO: Shrouded 20-pin 2-row 0.100" header (pictured below). See the 4801 hardware manual for details. JP5 is connected directly to the PC87366 Multi-IO chip, see the PC87366 data sheet for more information.

JP5 Pin 2 is able to supply up to 1A of current, but the physical pin or attached cable might limit that due to size. All the JP5 GPIO pins provide 3.3V out and are 5V input tolerant.

JP6 - USB connector: Back edge right.

JP7 - LEDs: Back edge, between P1 serial connector and power connector: 4-pin single-row 0.100" header. Pin1 is common (+3.3V), pin2 power, pin3 error, pin4 HDD - low when active.

JP7 Pins
Pin	Function
1	+3.3 V	Common.
2	Power On LED	This green LED will be on when there is applied power to the board.
3	Error LED	This red LED is connected to the SC1100 processor GPIO20, pin D21. It is connected so that it will be on at power on, and can then be turned off and on by software control. When programming GPIO20 with a 0, it will be off. The BIOS will normally turn it off just before booting an operating system.
4	Disk Activity LED	This yellow LED will be on when there is disk activity, either by the CompactFlash module or the optional Hard Disk.
low when active

**JP8 pins**
Pin	Function
1	Vcc
2	Data-
3	Data+
4	Ground

JP8 - USB port: Left center of the board, right next to the CF connector: 4-pin 0.100" single row header. Pin1 marked by "pin1" text in silk-print. Second USB connector, standard USB extension cable pinout: 1=Vcc, 2=Data-, 3=Data+, 4=ground. Whether this second USB port is USB 1.0 or 2.0, and whether it is capable of fast transfers: Read the discussion on soekris-tech.; Warning: Because USB extender cables stick up considerable, this connector can not be used if a hard disk mounting kit is installed. Ralphbsz' solution is to solder a right-angle header to the existing header, and lay the USB extension cable flat across the CF connector.

JP9 - Factory use: Front left corner: 2-pin 0.100" header, not populated from the factory.

JP10 - DC Power + GPIO
Pin	Function
1	GND
2	GND
3	VPWR
4	+5V
5	GPIO 4
6	GPIO 0

JP10 - Power+GPIO: 6-pin MTA100 connector (pictured below). See NET4801 manual for details. Digikey A31084-ND (MFG p/n 3-640440-6). JP10 pin 4 able to supply up to 1A.

JP11 through JP14 - Ethernet: RJ45, Back edge.

JP15 - Disk power connector: 4-pin MTA100 connector (pictured below). Matches 3.5" floppy disk power pinout. Digikey A31082-ND (MFG p/n 3-640440-4). Pin 1 able to supply up to 1A.

P1 - COM1 serial port: Back edge of board, 9-pin female D connector: Serial port. Industry standard pinout.

SW1 - Reset Button: Back edge of board, between serial port and power connector. According to BIOS setting this can either reset the machine directly, or you can take it under software control and read it as a general-purpose input (GPIO).