JPS6419856A - Serial transmission system - Google Patents
Serial transmission systemInfo
- Publication number
- JPS6419856A JPS6419856A JP63010554A JP1055488A JPS6419856A JP S6419856 A JPS6419856 A JP S6419856A JP 63010554 A JP63010554 A JP 63010554A JP 1055488 A JP1055488 A JP 1055488A JP S6419856 A JPS6419856 A JP S6419856A
- Authority
- JP
- Japan
- Prior art keywords
- control
- section
- bit
- message
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To provide a distribute processing unit separating safe data from unsafe data and generating and printing out a postal rate by providing a franking machine having two units or over each with computer control so as to provide communication between the units. CONSTITUTION: A franking machine 20 has a control section 75, an accounting section 57 and a print section 56, each section is provided with a CPU and with a crystal control clock. The communication between the sections is based on a serial message sent/received asynchronously and a format and bit timing are set accurately to warrant the synchronous transmission and reception. Furthermore, in the case of receiving a 1st bit of the transmission message, the received bit is sent back from the receiver to a transmitter for the comparison to attain proving of the validity of the message at a minimum time period in succession to the transmission of all messages. A total control and data signal is sent by using the conductor of a same pair in each direction in a timing decided accurately for the control.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63010554A JPS6419856A (en) | 1988-01-20 | 1988-01-20 | Serial transmission system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63010554A JPS6419856A (en) | 1988-01-20 | 1988-01-20 | Serial transmission system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6419856A true JPS6419856A (en) | 1989-01-23 |
JPH0467827B2 JPH0467827B2 (en) | 1992-10-29 |
Family
ID=11753472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63010554A Granted JPS6419856A (en) | 1988-01-20 | 1988-01-20 | Serial transmission system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6419856A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50103203A (en) * | 1974-01-07 | 1975-08-15 |
-
1988
- 1988-01-20 JP JP63010554A patent/JPS6419856A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50103203A (en) * | 1974-01-07 | 1975-08-15 |
Also Published As
Publication number | Publication date |
---|---|
JPH0467827B2 (en) | 1992-10-29 |
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