Intel mcs-48 Eoi, BUS9, OATA10, Gno, Opta Optb OATA1 IFC, BUS1 IFC, BUS2 AEN, OATA3

					8293
PIN DESCRIPTION						Symbo.
Symbol	110	Pin No.		Function		EOI
BUS1-	I/O	12,13,	These are the IEEE-488		bus
BUS9		1S·19,	interface	driver/rece!vers.
		21,22 Using the mode select pins,
			they can be configured .dlffer·
			ently to allow direct connec·
			tions between the 8291 GPIB
			Talker/Listener and the		8292
			GPIB Controller.
OATA1-	I/O	5·11,	These are the pins to be con·			ATN
OATA10		23-2S	nected to the 8291 and 8292 to
			interface with the GPIB bus.
			Their use is programmed by
			the two mode select pins,
			OPTA and OPTB. All these			oPTA
			pins are TTL compatible.
T/R1			Transmit	receive 1; this	pin	OPTB
			controls	the direction	for
			NOAC, NAFO, OAV, and 0101-
			0108. Input is TTL compatible.			Vee
T/R2		2	Transmit	receive 2; this	pin
			controls the direction for EOL
			Input is TTL compatible.			GNO

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110 Pin No; Function

I/O 3 End or Identify; this pin indio cates the end of a multiple byte .transfer or, In conjunc· tion with ATN, addresses the device during a polling se· quence. It connects to the 8291 and is switched between transmit and receive by T/R2.

. This pin is TTL compatible.

04 Attention; this pin is used by the 8291 to monitor the GPIB' ATN control line. It specifies how data on the 010 lines is to be interpreted. This output is TTL compatible.

27These two pins are to control

I 26 the function of the 8293. A truth table of how this pro- grams the various modes is in Table 1.

P.S. 28 Positive power supply (SV

±10%).

P.S. 14,20 Circuit ground potential.

Table 1. 8293 Mode Selection Pin Mapping
			IEEE Implementation Name
Pin Name	Pin No.	Mode 0	Mode 1	Mode 2	Mode 3
OPTA	27	0	1	0	1
OPTB	26	0	0	1	1
OATA1	S	IFC	0108	n=c	0108
BUS1	12	IFC'	0108'	IFC'	OIOS'
OATA2	6	AEN	0107	AEN	0107
BUS2	13	AEN'	0107'	AEN'	0107'
OATA3	7	NC	0106	EOl2	0106
BUS3	1S	EOI'	0106'	EOI'	0106'
OATA4	8	SAO	OIOS	SAO	0105
BUS4	16	SAO'	OIOS'	SAO'	OIOS'
OATAS	9	NAFO	0104	NAFO	0104
BUSS	17	NAFO'	0104'	NAFO'	0104'
OATA6	10	~	~	NOAC	0103
BUS6	18	NOAC'	0103'	NOAC'	0103'
OATA7	11	T/R101	NC	ATNI	ATNO
OATA8	23	T/R102	0102	ATNO	0102
BUS7	19	ATN'	0102'	ATN'	0102'
OATA9	24	G101	OAV	CIC	OAV
BUS8 .	21	G101'	OAV'	CLTH	OAV'
OATA10	2S	GI02	0101	IFCL	0101
BUS9	22	G102'	0101'	SYC	0101'
T/R1	1	T/R1	T/R1	TfR1	TlFh
T/R2	2	T/R2	NC	T/R2	IFCL
EOI	3	EOI	EOI	mr	EOI
ATN	4	ATN	Aiiil	Am'	ATN

'Note:These pins are the IEEE-488 bus non·lnvertlngdriver/receivers. They Include all the bus terminations required by the Standard and may be connected directly to the GPIB bus connector.

9-109