Measurement-computing Serial488A Manual do Utilizador descarregar pdf (Página 66)

5.7

All

Ready

All

Ready

None

Ready

None

Ready

Valid Not

Valid

Not

Valid

1st Data Byte 2nd Data Byte

All

None

DIO1-8

(composite)

DAV

NRFD

NDAC

Source

Acceptor

IEEE Bus Handshaking

5.6 DATA LINES

The

GPIB

provides eight data lines for a bit parallel/byte serial data transfer.

These eight data lines use the convention of

DIO1

through

DIO8

instead of the binary

designation of

. The data lines are bidirectional and are active low.

5.7 MULTILINE COMMANDS

Multiline

(bus) commands are sent by the

Active

Controller

over the data bus

with

ATN

asserted. These commands include addressing commands for talk, listen,

Untalk and Unlisten.

5.7.1 Go To Local (GTL)

This command allows the selected devices to be manually controlled.

($01)

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 84 85

User’s Manual 1
Introduction 3
Serial488A/OEM 8
Getting Started 11
IEEE Addr 12
IEEE Term 12
Serial488/512K 17
8 Data Bits 7 Data Bits 18
1 Stop Bit 2 Stop Bits 18
Parity Disabled 19
Echo Disabled Echo Enabled 19
Odd Parity Mark Parity 19
Even Parity Space Parity 19
RTS/CTS Xon/Xoff 20
CR Only LF-CR 21
LF Only CR-LF 21
EOI Disabled EOI Enabled 22
IEEE Address = 10 24
RS-422 RS-232 26
Shorting Plug 26
DB-9 Male DB-25 Male 30
Mini DIN8 Male DB-25 Male 30
DB-25 Female DB-25 Male 31
DB-9 Female DB-25 Male 31
Controller Operation 35
Talk Back on 39
Time Out Disabled 39
Time Out Enabled 39
Serial488A 48
Peripheral Operation 50
SRQ on Last 53
Terminator Disabled 53
Terminator Enabled 53
1428163264128 54
IEEE 488 Primer 60
IEEE 488 Bus Structure 62
Figure 5.1 62
Service Information 71
Sample Programs 84

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