EP3C16F484A7N Altera, EP3C16F484A7N Datasheet - Page 251

• Manufacturer Part Number: EP3C16F484A7N
• Description: Cyclone III
• Manufacturer: Altera

Specifications of EP3C16F484A7N

• Family Name: Cyclone III
• Number Of Logic Blocks/elements: 15408
• # I/os (max): 346
• Frequency (max): 437.5MHz
• Process Technology: 65nm
• Operating Supply Voltage (typ): 1.2V
• Logic Cells: 15408
• Ram Bits: 516096
• Operating Supply Voltage (min): 1.15V
• Operating Supply Voltage (max): 1.25V
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 484
• Package Type: FBGA
• Lead Free Status / Rohs Status: Compliant

Chapter 10: Hot-Socketing and Power-On Reset in the Cyclone III Device Family
Hot-Socketing Feature Implementation
Hot-Socketing Feature Implementation
Figure 10–1. Hot-socketing Circuit Block Diagram for Cyclone III Device Family
© December 2009
1
Altera Corporation
Each I/O pin has the circuitry shown in
not include CONF_DONE, nCEO, and nSTATUS pins to ensure that they are able to
operate during configuration. Thus, it is expected behavior for these pins to drive out
during power up and power down sequences.
Figure 10–1
family.
The POR circuit monitors the voltage level of power supplies and keeps the I/O pins
tristated until the device is in user mode. The weak pull-up resistor (R) in Cyclone III
device family I/O element (IOE) keeps the I/O pins from floating. The 3.0-V tolerance
control circuit permits the I/O pins to be driven by 3.0 V before V
supplies are powered up, and it prevents the I/O pins from driving out when the
device is not in user mode.
Altera uses GND as reference for hot-socketing operation and I/O buffer designs. To
ensure proper operation, Altera recommends connecting the GND between boards
before connecting the power supplies. This prevents the GND on your board from
being pulled up inadvertently by a path to power through other components on your
board. A pulled up GND can otherwise cause an out-of-specification I/O voltage or
current condition with the Altera
Resistor
Pull-Up
Weak
PAD
shows the hot-socketing circuit block diagram for Cyclone III device
R
V
CCIO
®
Input Buffer
to Logic Array
Tolerance
device.
Voltage
Control
Figure
Output Enable
10–1. The hot-socketing circuit does
Hot Socket
Pre-Driver
Output
Power On
Monitor
Reset
Cyclone III Device Handbook, Volume 1
CCIO
, V
CC
, and V
CCA
10–3