Posts Tagged ‘hava console’

Hava Serial console

The Hava Titanium HD has a logic level serial console available on J21. The logic level is 3.3 volts. Only three wires are needed, pins 1, 4, and 5. Remember, this is a LOGIC LEVEL port, not RS232. Don’t try to hook it directly to a PC serial port. You need either a level converter like a MAX232 chip, a modified serial port that is logic level, or a serial port designed to work at logic levels. I’m using one of the logic level serial ports on a Signalyzer JTAG pod.

When the board boots the port is at 115200 baud 8N1. This is the setting that the RedBoot monitor uses. When the Linux kernel starts booting it changes the port to 9600 baud 8N1.