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(10) Timing Chart
When receiving normal data:
DATA 1 ~ 8
(Host → Printer)
DATA • STB
(Host → Printer)
BUSY
(Host ← Printer)
ACK
(Host ← Printer)
Receiving data when the blank positions in the receive buffer are 512 bytes or less:
When the blank positions in the receive buffer are 512 bytes or less, the printer continues to
be in a BUSY state (BUSY signal at "High" level) for 10 seconds to extend the data read
interval when data is set from the host and reads the data 10 seconds later.
If the blank positions are 513 bytes or more while waiting for reading data, the printer will
receive the data with the normal data receive timing.
When there are no blank positions in the receive buffer, the printer stops reading data.
Then, it continues to be in a BUSY state (BUSY signal at "High" level) until there are blank
positions in the receive buffer when data is set from the host.
DATA 1 ~ 8
(Host → Printer)
DATA • STB
(Host → Printer)
BUSY
(Host ← Printer)
ACK
(Host ← Printer)
T1
T5
511 blank bytes
512 blank bytes
513 blank bytes
T5 = 10 sec.
- 10 -
T3
T2
T4
T1 = Min. 1 µsec.
T2 = Min. 0.5 µsec.
T3 = Min. 1 µsec.
T4 = Min. 5 µsec.
0 blank byte
1 blank byte
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