Difference between revisions of "Z80-SIO dual ports RS232 interface for CPC (French)"

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(Technical)
Line 6: Line 6:
  
 
   FC5Ch Latch 74LS273 (IC8) for COM8116 (IC9)
 
   FC5Ch Latch 74LS273 (IC8) for COM8116 (IC9)
   FC7Ch Channel A Data
+
          Bit7-4  Channel A RX/TX Clock
   FC7Dh Channel A Control/Status
+
          Bit3-0  Channel B RX/TX Clock
   FC7Eh Channel B Data
+
   FC7Ch [[Z80-DART/Z80-SIO chip|Z80 SIO]] Channel A Data
   FC7Fh Channel B Control/Status
+
   FC7Dh [[Z80-DART/Z80-SIO chip|Z80 SIO]] Channel A Control/Status
 +
   FC7Eh [[Z80-DART/Z80-SIO chip|Z80 SIO]] Channel B Data
 +
   FC7Fh [[Z80-DART/Z80-SIO chip|Z80 SIO]] Channel B Control/Status
  
 
For details on the Z80 SIO, see [[Z80-DART/Z80-SIO chip]].
 
For details on the Z80 SIO, see [[Z80-DART/Z80-SIO chip]].
  
[[http://www.cpcwiki.eu/imgs/b/b8/Rs232fr.zip]] All scans.
+
The COM8116 chip is driven by a 4.9152 MHz crystal. Selectable clock sources are:
 +
0=800 Hz    4=2400 Hz    8=28800 Hz  12=76800 Hz
 +
1=1200 Hz  5=4800 Hz    9=32000 Hz  13=115200 Hz
 +
2=1760 Hz  6=9600 Hz  10=38400 Hz  14=153600 Hz
 +
3=2152 Hz  7=19200 Hz  11=57600 Hz  15=307200 Hz
 +
The baudrates can be further divided by 1,16,32,64 inside of the Z80 SIO.
 +
 
 +
[[Media:Rs232fr.zip]] - Scanned DIY article (8 pages).

Revision as of 09:27, 6 May 2010

Philippe Lebel's Z80-SIO dual ports RS232 interface for CPC.

Scans of article from French magazine including description, schematic and PCB project.

Technical

 FC5Ch Latch 74LS273 (IC8) for COM8116 (IC9)
         Bit7-4  Channel A RX/TX Clock
         Bit3-0  Channel B RX/TX Clock
 FC7Ch Z80 SIO Channel A Data
 FC7Dh Z80 SIO Channel A Control/Status
 FC7Eh Z80 SIO Channel B Data
 FC7Fh Z80 SIO Channel B Control/Status

For details on the Z80 SIO, see Z80-DART/Z80-SIO chip.

The COM8116 chip is driven by a 4.9152 MHz crystal. Selectable clock sources are:

0=800 Hz    4=2400 Hz    8=28800 Hz   12=76800 Hz
1=1200 Hz   5=4800 Hz    9=32000 Hz   13=115200 Hz
2=1760 Hz   6=9600 Hz   10=38400 Hz   14=153600 Hz
3=2152 Hz   7=19200 Hz  11=57600 Hz   15=307200 Hz

The baudrates can be further divided by 1,16,32,64 inside of the Z80 SIO.

Media:Rs232fr.zip - Scanned DIY article (8 pages).