EP1C3 ALTERA [Altera Corporation], EP1C3 Datasheet - Page 61

• Manufacturer Part Number: EP1C3
• Description: Cyclone FPGA Family
• Manufacturer: ALTERA [Altera Corporation]

Preliminary Information
Altera Corporation
Cyclone devices support reconfiguring the I/O standard settings on the
IOE through the JTAG BST chain. The JTAG chain can update the I/O
standard for all input and output pins any time before or during user
mode. Designers can use this ability for JTAG testing before configuration
when some of the Cyclone pins drive or receive from other devices on the
board using voltage-referenced standards. Since the Cyclone device might
not be configured before JTAG testing, the I/O pins might not be
configured for appropriate electrical standards for chip-to-chip
communication. Programming those I/O standards via JTAG allows
designers to fully test I/O connection to other devices.
The JTAG pins support 1.5-V/1.8-V or 2.5-V/3.3-V I/O standards. The
TDO pin voltage is determined by the V
The bank V
3.3-V compatible.
Cyclone devices also use the JTAG port to monitor the operation of the
device with the SignalTap II embedded logic analyzer. Cyclone devices
support the JTAG instructions shown in
CCIO
selects whether the JTAG inputs are 1.5-V, 1.8-V, 2.5-V, or
CCIO
Table
Cyclone FPGA Family Data Sheet
of the bank where it resides.
18.
61