BIXOLON SRP-E770III - Thermal Pinter Circuit

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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