Tektronix Phaser 600 Manuel d'utilisateur Page 528

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PARALLEL PORT PIN SIGNALS
512
15 nStrobe/HostClk 33 Host C mode: Negative true = transfer data into
printer input latch on rising edge
N mode: Negative true = transfer
Extensibility Request value into printer input
latch on rising edge
16 nSelectIn/1284 Active 34 Host
C mode: Negative true = select printer
N mode: Used in conjunction with
HostBusy for 1284 hardware handshaking
17 nAutoFd/HostBusy 35 Host C mode: Not used
N mode: Used in conjunction with 1284
Active for 1284 hardware handshaking
18 Host Logic High Host Positive true = host signals valid
Negative true = host signals invalid
36 Peripheral Logic High Printer
Positive true = printer on
Negative true = printer off
Parallel port signals (cont'd.)
Pin Signal mode names:
Compatibility/Nibble
Return
pin
Signal
source
Description
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