This is a Tibbit module — part of the Tibbo Project System that allows you to build your own custom embedded device with only the components you need. Start with a Tibbo Project PCB, add Tibbits like this one, then place the built design into a Tibbo Project Box to complete your product.
Tibbit #01: Simple RS232 port with only TX, RX, RTS, and CTS lines.
This is a standard "simple" RS232 port. This Tibbit is based on a generic RS232 transceiver (Zywyn ZT232F). For "normal" RS232 applications, this Tibbit has to be connected to the TX and RX lines of the CPU's UART (see [SER]). If you plan to use RTS/CTS flow control as well, an interrupt line must be available (see [INT]).
Combining this Tibbit with the C Tibbit #19 (DB9M connector) will create a serial port with standard pin assignment on the DB9M:
|Pin 1||No connection|
|Pin 2||RX (input)|
|Pin 3||TX (output)|
|Pin 4||No connection|
|Pin 6||No connection|
|Pin 7||RTS (output)|
|Pin 8||CTS (input)|
|Pin 9||No connection|
You also can combine this RS232 Tibbit with #20 (nine terminal blocks). You may be able to use #21 (four terminal blocks) alternatively if you can steal the Ground from elsewhere (#21 doesn't have its own Ground line).
There are four LEDs. Red LEDs are connected to the TX and RTS lines. Green LEDs are for RX and CTS. All of these LEDs are buffered (with logic gates) and light up for the LOW state of control lines.
- Form: M1S
- Power: 5V; consumes 20mA
- Special lines: [SER], [INT]
- Mates with: #19, #20, #21 (limited use)
- Similar to: #02, #05
M1S Tibbit Modules Overview M1S Tibbits are single-width modules occupying one standard M socket on a Tibbo Project PCB (i.e. TPP2 or TPP3). Their footprint is roughly 7 × 14 "squares" (one "square" is 2.54 × 2.54 mm). The M1S modules are 12.5mm high.
M1 modules have two rows of 6 pins:
Pins 8-11 are control lines A-D. They provide the interface to programmable modules or other microcontrollers. On Tibbo Project PCBs, these pins are connected to the main processor.
Pins 2-5 are I/O lines facing the outside world. On Tibbo Project PCBs, they go to C Tibbits.
Pins 6 and 12 are the GROUND and +5V power pins. Most Tibbit Modules consume (take) 5V power. There are also power supply Tibbits that generate 5V power from a variety of sources. Those output 5V through pin 12.
Pins 1 and 7 are for the additional +15V and -15V voltages. These are optional and only needed by few Tibbits. A special power supply Tibbit (#12) generates ±15V from the main 5V power.