Siemens PC 670 manual Assignment of internal interfaces on the mainboard

Hardware Information Release 04/02

Internal serial interface COM2 (V.24), X26

This port is connected in parallel to the external COM2 port. Both ports can therefore only be used as alternately. They are assigned such that a 1:1 connection can be established to a 9-pin D-SUB socket when insulation displacement connectors are used. The maximum cable length is 100 cm at a data rate of 9.6 kbaud.

Pin No.

Short Name

Meaning

Input/Output

1	DCD	Data carrier detect	Input
2	DSR	Data set ready	Input
3	RxD	Received data	Input
4	RTS	Request to send	Output
5	TxD	Transmission data	Output
6	CTS	Clear to send	Input
7	DTR	Data terminal equipment ready	Input
8	IP	Incoming call	Input
9	GND	Functional ground (reference	-
		potential)
10	P5V	+5V power supply	Output

7.5.3Assignment of internal interfaces on the mainboard

Interface	Position	Connector	Description
Memory	Internal	X19, X20	2 SO-DIMM slot, 64Bit
Processor	Internal	X1	Socket for MMC2 mobile processor
Bus expansion	Internal	X10	Socket for bus extender, assigned with
			ISA and PCI bus signals
Power supply	Internal	X13	20 pin connector for DC signals of the
105W			power supply unit with 85W
Floppy	Internal	X5	two drives are possible (82078 compati-
			ble)
			360kB, 720kB, 1.2MB, 1.44MB
			3F0h-3F7h, 370h-377h, can be disabled
			IRQ 6, edge-triggered
			26 pin, socket for flex-lead (notebook con-
			nection)
3.5” hard disk	Internal	X41	170h-177h, 1F0h-1F7h, can be disabled
			IRQ14, IRQ15, edge-triggered
			40 pin, 2.54mm male connector (3.5” HD,
			primary),
			a maximum of two drives can be connec-
			ted

7-24 Panel PC 670 Computing Unit, Equipment Manual