Interface; Interface Types; Rs232 Interface - Star Micronics TSP200 Series Technical Manual

2.

Interface

2-1. Interface Types

2-1-1. RS232 interface

CN6
RXD
TXD
DSR
DTR
RTS
FAULT
INIT
Data flow from host to printer: IC10 receives serial data from the host through RXD, converts the voltage level from
Data flow from printer to host: The CPU generates the data, converts it into serial form, then passes it to IC10. IC10
IC10
ADM232LJR
TTL
232C
TTL
232C
Comparator
Comparator
Fig. 2-2 Serial Interface
RS232C to TTL, and passes the result to the CPU. The CPU converts the serial data to
parallel form and stores the result into buffer memory.
converts the level from TTL to RS232C and outputs the result over the TXD line.
– 13 –
PRINCIPLES OF OPERATION
IC1 CPU
RXD 0
TXD 0
P93
P91
P94
Dipswitch 2-3
Dipswitch 2-4