Diamond Systems 1.01, High INtegration PC/104 Celeron CPU with Ethernet user manual System I/O

6. SYSTEM I/O

6.1Serial Port Connectors

Morpheus supports serial protocols RS-232, RS-422, and RS-485. Serial port 1 supports RS-232 only and serial port 2 supports RS-232/422/485. J5 configures the serial protocol for port 2. Information concerning J5 can be found on page 7. When connecting cables, connect the side with the red stripe to pin 1 on the Morpheus. Using the cable supplied in the cable kit C-MOR-KIT, the DB-9 connector will provide the standard DTE pinout for a PC serial port. The pinouts shown below are for the pin headers on Morpheus, NOT the DB-9 connector.

RS-232 Configuration:				RXD
	DCD	1	2
	TXD	3	4	DTR
	GND	5	6	DSR
	RTS	7	8	CTS
	RI	9	10	NC
RS-485 Configuration:
	DATA+	1	2	DATA-
	NC	3	4	NC
	GND	5	6	NC
	NC	7	8	NC
	NC	9	10	NC
RS-422 Configuration:				TXD-
	TXD+	1	2
	NC	3	4	NC
	GND	5	6	NC
	NC	7	8	RXD+
	RXD-	9	10	NC
SIGNAL NAME	DEFINITION			DIRECTION
RS-232:
DCD	Data Carrier Detect			Input
RXD	Receive Data			Input
TXD	Transmit Data			Output
DTR	Data Terminal Ready			Output
GND	Ground			---
DSR	Data Set Ready			Input
RTS	Request To Send			Output
CTS	Clear To Send			Input
RI	Ring Indicator			Input
NC	Not Connected			---

Morpheus CPU User Manual V1.01 Page 8