參數(shù)資料
型號: EP1C6T324C6
廠商: Altera Corporation
英文描述: Cyclone FPGA Family
中文描述: 氣旋FPGA系列
文件頁數(shù): 44/94頁
文件大小: 1138K
代理商: EP1C6T324C6
44
Altera Corporation
Cyclone FPGA Family Data Sheet
Preliminary Information
I/O Structure
IOEs support many features, including:
Differential and single-ended I/O standards
3.3-V, 32-bit, 66-MHz PCI compliance
Joint Test Action Group (JTAG) boundary-scan test (BST) support
Output drive strength control
Weak pull-up resistors during configuration
Slew-rate control
Tri-state buffers
Bus-hold circuitry
Programmable pull-up resistors in user mode
Programmable input and output delays
Open-drain outputs
DQ and DQS I/O pins
Cyclone device IOEs contain a bidirectional I/O buffer and three registers
for complete embedded bidirectional single data rate transfer.
Figure 27
shows the Cyclone IOE structure. The IOE contains one input register, one
output register, and one output enable register. The designer can use the
input registers for fast setup times and output registers for fast clock-to-
output times. Additionally, the designer can use the output enable (OE)
register for fast clock-to-output enable timing. The Quartus II software
automatically duplicates a single OE register that controls multiple output
or bidirectional pins. IOEs can be used as input, output, or bidirectional
pins.
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