
SRP-E770III
4-3-3 RS232C Communication Block Diagram
The CPU and RS-232C driver (ST3232) are used for serial communication.
1) RS232C Communication block diagram
2) RS232C Communication waveform
CPU
ST3232
Driver
D-SUB9
Female
Host
Printer
Host
Printer
Transmit data
Host not Busy
Host Busy
Host Busy
CTS
RTS
RX
TXD
Transmit(Printer to Host)
Receive(Host to Printer)
Transmit data
Printer not Busy
Printer
Printer
RTS
CTS
TXD
RX
Figure 4-2 RS232C Communication Block
Figure 4-3 RS232C Communication Waveform
Ver. 1.01
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Summary of Contents for SRP-E770III Series
Page 1: ...Service Manual Label Printer Ver 1 01 SRP E770III...
Page 30: ...SRP E770III 4 2 Block Diagram Ver 1 01 30...
Page 51: ...SRP E770III 7 1 2 LED dose not light Ver 1 01 51...
Page 55: ...SRP E770III 7 1 6 Data from host is not printed normal Ver 1 01 55...
Page 56: ...SRP E770III 7 2 Power Problem Ver 1 01 56...
Page 57: ...SRP E770III 7 3 System Problem Ver 1 01 57...
Page 58: ...SRP E770III 7 4 Panel PBA and Media Sensor Problem Ver 1 01 58...
Page 60: ...SRP E770III 7 6 RS 232C Serial Communication Problem Ver 1 01 60...
Page 61: ...SRP E770III 7 7 USB Communication Problem Ver 1 01 61...
Page 62: ...SRP E770III 7 8 Ethernet Communication Problem Ver 1 01 62...