Error processing when receiving serial data
The
When the
If there are any errors, the following data is stored in the input buffer according to the type of error.
Error type Error code Parity error (!: 2116) Framing error (?: 3F16)
If the input data cannot be printed correctly and instead “!” or “?” is printed, the transmission conditions between the host device and the
2.7THERMAL HEAD CONTROL
Data Transfer to the Thermal Head
The
The data is transferred in order to the shift register inside the thermal head from the left (when facing the paper feed direction).
The transferred data is then transferred by the head latch signal to the latch register inside the thermal head. Turning on the head strobe signal initiates printing of one dot line of data on the thermal paper.
2.7.1 Thermal Head Drive Operation
Generally, when the line thermal head is operating, the line is divided into several blocks, which are activated one after another in succession.
For the line thermal head of the FTP608 printer mechanism, the line is divided into 7 blocks called physical blocks, 216, 288 or 416 dots with each. A strobe signal (/ST1 to /ST7) is allocated to each physical block to activate it. To drive the head, physical blocks are activated in groups. The group of physical blocks is called a logical block.
For the
2.7.2 Peak power limitation
The