Icb settings in jtag configuration, Icb settings in jtag configuration -4 – Altera MAX 10 FPGA User Manual
Page 34
JTAGEN
If you use the
JTAGEN
pin, Altera recommends the following settings:
• Once you entered user mode and JTAG pins are regular I/O pins—connect the
JTAGEN
pin to a weak
pull-down (1 kΩ).
• Once you entered user mode and JTAG pins are dedicated pins—connect the
JTAGEN
pin to a weak
pull-up (10 kΩ).
ICB Settings in JTAG Configuration
The ICB settings is loaded into the device during
.pof
programming of the internal configuration scheme.
The .sof used during JTAG configuration does not contain ICB settings. The Quartus II Programmer will
make the necessary setting based on the following:
• Device without ICB settings—ICB settings cleared from the internal flash or new device
• Device with ICB settings—prior ICB settings programmed using
.pof
Device Without ICB Settings
For devices without ICB settings, the default value will be used. However, Quartus II Programmer disables
the user watchdog timer by setting the Watchdog Timer Enable bit to 0. This step is to avoid any
unwanted reconfiguration occurred due to user watchdog timeout.
If the default ICB setting is undesired, you can program the desirable ICB setting first by using
.pof
programming before doing the JTAG configuration.
Device With ICB Settings
For device with ICB settings, the settings will be preserved until the internal flash is erased. Hence, you
need to remember the previous ICB settings because JTAG configuration will follow the ICB setting and
behave accordingly.
If the prior ICB setting is undesired, you can program the desirable ICB setting first by using
.pof
programming before doing the JTAG configuration.
Related Information
•
•
.pof Generation through Convert Programming Files
on page 3-6
Provides more information about setting the ICB during .pof generation using Convert Programming
File.
•
on page 2-24
Provides more information about Instant ON and other power on reset scheme.
•
•
on page 2-16
•
ISP and Real-Time ISP Instructions
•
on page 2-14
Configuring MAX 10 Devices using Internal Configuration
There are three main steps for using internal configuration scheme for MAX 10 devices.
3-4
ICB Settings in JTAG Configuration
UG-M10CONFIG
2015.05.04
Altera Corporation
MAX 10 FPGA Configuration Design Guidelines