Tektronix Phaser 340 User Manual page 183

A
Technical Notes
A-12
Phaser 340 Color Printer
Parallel port signal descriptions (cont'd.)
Pin Signal mode names:
Compatibility/Nibble
14 nInit/nHostRTS
15 nStrobe/HostClk
16 nSelectIn/1284 Active
17 nAutoFd/HostBusy
18 Host Logic High
36 Peripheral Logic High
Return Signal Description
pin source
32 Host C mode: Negative true = reset
N mode: Set positive
33 Host C mode: Negative true = transfer
N mode: Negative true = transfer
34 Host C mode: Negative true = select
N mode: Used in conjunction with
35 Host C mode: Not used
N mode: Used in conjunction with
Host Positive true = host signals valid
Negative true = host signals invalid
Printer Positive true = printer on
Negative true = printer off
interface
data into printer input latch
on rising edge
Extensibility Request
value into printer input
latch on rising edge
printer
HostBusy for 1284
hardware handshaking
1284 Active for 1284
hardware handshaking