4.2PARALLEL INTERFACE
1. Data input timing
DATA0 to 7
T3
T1 T2
STROBE
T4
BUSY
T5
T6 
T7
ACK
| Min. | Max. | Unit |
T1 | 0.1 | − | ∝s |
T2 | 0.5 | − | ∝s |
T3 | 0.5 | − | ∝s |
T4 | − | 0.5 | ∝s |
T5 | 0 | − | ∝s |
T6 | 0.5 | − | ∝s |
T7 | − | 1.0 | ∝s |
4.3SERIAL INTERFACE
1.Hardware control
The RTS signal (Low or High) controls the transmission of the data from a host computer.
When the data stored in the input buffer of the printer exceeds 4,046 bytes, the RTS signal turns Low.
Once the RTS signal turns Low, the host computer stops to transmit the data.
If the data stored in the input buffer of the printer falls below 3,995 bytes, the RTS signal turns High.
Once the RTS signal turns High, the host computer resumes transmitting the rest of the data.
∗When the printer fails (for example,