Printronix P7000 H-Series Cartridge Ribbon Printer - Manual (Page 119)

Signals
119
NOTE: The length of the data cable from the host computer to the printer
should not exceed 32 feet (10 meters).
Host Clock / nWrite. Driven by host. Data transferred from host to printer.
When printer sends data, two types are available. If Nibble mode, signal is set
high. If Byte mode, signal is set low.
Data 1 through Data 8. These pins are host-driven in Compatibility mode and
bidirectional in Byte mode. They are not used in Nibble mode. Data 1 is the
least significant bit; Data 8 is the most significant bit.
14 Host nAutoFd Host Busy HostAck
15 Not Defined
16 Logic Grid
17 Chassis Grid
18 Printer Peripheral Logic High
19 Signal Ground (nStrobe)
20 Signal Ground (Data 1)
21 Signal Ground (Data 2)
22 Signal Ground (Data 3)
23 Signal Ground (Data 4)
24 Signal Ground (Data 5)
25 Signal Ground (Data 6)
26 Signal Ground (Data 7)
27 Signal Ground (Data 8)
28 Signal Ground (PError, Select, nAck)
29 Signal Ground (Busy, nFault)
30 Signal Ground (nAutoFd, nSelectIn, nInit)
31 Host nInit
32 Printer NFault nDataAvail aDataAvail
33 Not Defined
34 Not Defined
35 Not Defined
36 Host nSelectIn 1284 Active 1284 Active
Table 6. 1284 Signals (continued)
Pin Source of Data
Type of Mode
Compatible Nibble Byte