BIXOLON SRP-E770III Series, Руководство по обслуживанию, Страница: 35 / 63

SRP-E770III
4-3-6 Thermal Pinter Circuit
First, the CPU sends a serial clock and serial data 832bits (104bytes) to the shift register of the TPH. Second,
the CPU send a Latch signal to the TPH. Then the Data of both shift register#1 and #2 are moved to the
Latch register. After that the CPU sends a strobe signal to the TPH. Then the TPH outputs the serial data.
Each strobe signal controls the each dot of TPH.
Table 4-1 Printer Head Strobe Processing
Strobe No.(TPH) Dot No. Dots/STB Strobe pin(CPU)
STB1 1 ~ 192 192 TPH_STB1
STB2 193 ~ 320 128 TPH_STB1
STB3 321 ~ 448 128 TPH_STB1
STB4 449 ~ 576 128 TPH_STB2
STB5 577 ~ 704 128 TPH_STB2
STB6 705 ~ 832 128 TPH_STB2
CPU
Printer Line
Strobe Circuit
Latch Register
Shift Register #1 Shift Register #2
TPH_STB1
TPH_STB2
/Latch
CLK
Data
TPH
Figure 4-6 Thermal Printer Block Diagram
Figure 4-7 Thermal Printer Timing Waveform
CLK
Data #1,2
/LATCH
Strobe 1
Strobe 2
832 bits 832 bits 832 bits
Printing 832 bits
Printing 832 bits
Ver. 1.01
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