Sam4s ER-5200 Service Manual page 52
Electronic cash register
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Also See for ER-5200:
- Operation and program manual (7 pages) ,
- Operation and program manual (194 pages) ,
- Service manual (123 pages)
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7 Special Circuit Descriptions
7-5 RS-232C & IRC Communication Block Diagram
TRANSMIT ACTION(ECR)
DATA
TX/RX_A
TX/RX_B
RECEIVE ACTION(ECR)
TX/RX_A
TX/RX_B
7-8
Transmission a data (1 Byte)
A-B =
A-B =
A-B =
(-)Level
(+)Level
(-)Level
Received data (1 Byte)
Figure 7-12 IRC Waveform
A-B =
A-B =
(+)Level
(-)Level
"H"
"L"
(+)Level
Gnd
(+)Level
Gnd
(+)Level (5V)
Gnd
(+)Level (5V)
Gnd
SAM4S ER-5200 Series
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