Campbell Manufacturing CR10 SECTION 6. 9-PINSERIAL INPUT/OUTPUT, PIN, ABR, I/O, PIN, ABR, I/O, Description, Description, 6.1 PIN DESCRIPTION, TABLE 6.1-1.Pin Description

SECTION 6. 9-PIN SERIAL INPUT/OUTPUT

6.1 PIN DESCRIPTION

All external communication peripherals connect to the CR10 through the 9-pin subminiature D- type socket connector located on the front of the Wiring Panel (Figure 6.1-1). Table 6.1-1 shows the I/O pin configuration, and gives a brief description of the function of each pin.

FIGURE 6.1-1. 9-pin Female ConnectorTABLE 6.1-1. Pin Description

ABR	= Abbreviation for the function name.
PIN	= Pin number.
O	= Signal Out of the CR10 to a peripheral.
I	= Signal Into the CR10 from a peripheral.
PIN	ABR	I/O	Description
1	5 V	O	5V: Sources 5 VDC, used
			to power peripherals.
2	SG		Signal Ground:
			Provides a power return
			for pin 1 (5V), and is
			used as a reference for
			voltage levels.
3	RING	I	Ring: Raised by a
			peripheral to put the
			CR10 in the
			telecommunications
			mode.
4	RXD	I	Receive Data: Serial
			data transmitted by a
			peripheral are received
			on pin 4.
5	ME	O	Modem Enable: Raised
			when the CR10
			determines that a
			modem raised the ring
			line.

PIN	ABR	I/O	Description
6	SDE	O	Synchronous Device
			Enable: Used to
			address Synchronous
			Devices (SDs), and can
			be used as an enable
			line for printers.
7	CLK/HS I/O		Clock/Handshake: Used
			with the SDE and TXD
			lines to address and
			transfer data to SDs.
			When not used as a
			clock, pin 7 can be used
			as a handshake line
			(during printer output,
			high enables, low
			disables).
8	TE	O	Tape Enable: Powers
			the cassette recorder
			during tape transfer.
9	TXD	O	Transmit Data: Serial
			data are transmitted
			from the CR10 to
			peripherals on pin 9;

logic low marking (0V) logic high spacing (5V) standard asynchronous ASCII, 8 data bits, no parity, 1 start bit, 1 stop bit, 300, 1200, 9600, 76,800 baud (user selectable).

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