Epson TM-L90 Developer's Manual page 93

Confidential
Data Reception Timing (Compatibility Mode)
DATA
nStrobe
Busy
nAck
Characteristic item
Data hold time (host)
Data setup time
Strobe pulse width
Ready cycle idle time
BUSY output delay time
Data transfer time
ACKNLG pulse width
BUSY release time
ACK cycle idle time
The printer latches data at the rising edge of the nStrobe signal.
A-8 Interface And Connectors
DATA n
tSetUP tSTB
tReady tBUSY
Symbol
tHold
tSetup
tSTB
tReady
tBUSY
tReply
tACK
tnBUSY
tNext
tHOLD
Peripheral Busy
tReply tACK tBUSY
Requirement
Minimum [ns]
750
750
750
0
0
0
500
0
0
DATA n+1
tNsxt
Maximum [ns]
-
-
-
-
500
W
10 s
2
W
-
Rev. A