Specifications

Altera Corporation 1–21
October 2007
Nios II Hardware Development Tutorial Creating the Example Design
Figure 1–9. JTAG UART MegaWizard
4. Click Finish. You return to the SOPC Builder System Contents tab,
and an instance of the JTAG UART named jtag_uart now appears in
the table of available components.
1 SOPC Builder automatically connects the data master port on
the Nios II core to the JTAG UART slave port. (The instruction
master port does not connect to the JTAG UART, because the
JTAG UART is not a memory device and cannot feed
instructions to the Nios II processor.) When building a system,
always verify that SOPC Builder's automatic connections are
appropriate for your system requirements.
f For further details on the JTAG UART, see the JTAG UART Core chapter
of the Quartus II Handbook Volume 5: Embedded Peripherals.
Add the Interval Timer
Most control systems use a timer component to enable precise calculation
of time. To provide a periodic system clock tick, the Nios II HAL requires
a timer.
Perform the following steps to add the timer: