Tektronix Phaser 340 - Manual (Page 183)

A Technical Notes
A-12 Phaser 340 Color Printer
14 nInit/nHostRTS 32 Host C mode: Negative true = reset
interface
N mode: Set positive
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 signal descriptions (cont'd.)
Pin Signal mode names:
Compatibility/Nibble Return
pin Signal
source Description