User guide

Cortex Microcontroller and VEXnet Joystick User Guide
Page 14 of 14
13.2-WireMotorPortoutputs:
a. Motor Port 1 and Motor Port 10.
b. Maximum motor stall current: 3.0 amps at 8.5 volts.
c. Motor chop rate: determined by the compiler. Default code chop rate: 1 kHz.
d. Overcurrent protection: Motor Port 1 through Motor Port 5 shares one 4 amp circuit breaker. Motor Port 6 through
Motor Port 10 shares a second 4 amp circuit breaker.
14.3-WireMotorPortoutputs:
a. Motor Ports 2 through 9.
b. Maximum motor stall current: internally limited by motor assembly.
c. Motor PWM output: determined by the compiler. Default is 1 to 2 milliseconds high time and a 17 millisecond period.
d. Overcurrent protection: Motor Port 1 through Motor Port 5 shares one 4 amp circuit breaker. Motor Port 6 through
Motor Port 10 shares a second 4 amp circuit breaker.
15. UART Connections:
a. Ground, Power (+5v), RX data in, TX data out. Data rate, byte width, (transmit) stop bits, parity, etc. are determined
by the compiler.
b. Default for LCD data: 19,200 baud, 8 data bits, 1 stop bit, no parity and no ow control.
16. I2C Connections:
a. Ground, Power (+5v), Clock, Data. Data rate, byte width, (transmit) stop bits, parity, etc. are determined by the
compiler.
b. The factory default Hex le does not support I2C.
17. Notes:
a. Do not use a USB Hub with the Cortex or Joystick. Always make a connection directly to a PC USB port when needed.
USB Hub performance is not supported.