FENIX IMVICO
TK14 OPERATION MANUAL
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Specification
Description Symbol
Min(ns) Max(ns)
Data hold time tHold 750 --
Data setup time tSetup 750 --
STROBE pulse width tSTB 750 --
READY cycle idle time tReady 0 --
BUSY output delay time tBUSY 0 500
Data processing time
tReply 0
∞
ACKNLG pulse width
tACK 500
10
µ
s
BUSY release time
tnBUSY 0
∞
ACK cycle idle time tNext 0 --
2.4.2- Reverse mode (Data transmission from the printer to the host system)
The transmission of the printer status to the host system is implemented according to the IEEE1284
standard (
NIBBLE MODE
).
2.4.3- Parallel interface pins assignment for each mode
Pin
Source
Compatibility mode
Nibble mode
1 Host Sys. nStrobe HostClk
2 Host Sys/printer Data0 (LSB) Data0 (LSB)
3 Host Sys/printer Data1 Data1
4 Host Sys/printer Data2 Data2
5 Host Sys/printer Data3 Data3
6 Host Sys/printer Data4 Data4
7 Host Sys/printer Data5 Data5
8 Host Sys/printer Data6 Data6
9 Printer Data7 (MSB) Data7 (MSB)
10 Printer nAck PrtClk
11 Printer Busy PrtBusy/Data3,7
12 Printer PError AckDataReq/Data2,6
13 Printer Selected Xflag/Data1,5
14 Host Sys. Nautofeed HostBusy
15 Printer nFault nDataAvail/Data0,4
16 Host Sys. nInit NInit
17 Host Sys. nSelectIn 1284-Active
18-25 GND GND
Table 2.3-
PC parallel connector (DB25).
