Baffa Homebrew Projects

Baffa-2 Serial SIO/2

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The serial interface allows the computer to comunicate with other devices. It's possible to connect to another computer via RS232 port, Modem/Wifi or even USB Serial. The maximum speed is 115200 Bauds and it's compatible to 4MHz and 8 MHz setups. PORT A is the main serial and it's generally used to the terminal access. PORT B is a secondary port and can be used as a "modem" for communicating with the outside world.

SIO/2 Rev.0

Z80 SIO/2 Rev.0


Related Files:



Settings

CLK1
=Connects Port A to Bus Clk
CLK2
=Connects Port B to Bus Clk
CLK_A_EQ_B
=Allows to connect same Clk to Port A and Port B. Don't connect both Clk1 and Clk2 jumpers and same time when using this option.
JP3
=oUses address 0x80-3
o=Uses address 0x84-7
PORT_A_5v
=Enables VCC 5v to pin 2 on Port A
PORT_A
Pin 1GND
Pin 2RTS
Pin 3VCC
Pin 4RX
Pin 5TX
Pin 6CTS
PORT_B_5v
=Enables VCC 5v to pin 2 on Port B
PORT_B
Pin 1GND
Pin 2RTS
Pin 3VCC
Pin 4RX
Pin 5TX
Pin 6CTS


Related Datasheets:



Related Projects:



Related Revisions:

  • Jul/2022 SIO/0
    * Replaces SIO/2 by SIO/0

  • Feb/2022 Rev.0
    * Adds CTS pin to PORT A
    * Adds CTS pin to PORT B
    * Jumper JP3 allows select address mapping 0x80-3 / 0x84-7

  • Jan/2022 Prototype


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