參數(shù)資料
型號: EP2C20F256I6N
廠商: ALTERA CORP
元件分類: FPGA
英文描述: FPGA, 1196 CLBS, PBGA256
封裝: LEAD FREE, FBGA-256
文件頁數(shù): 153/168頁
文件大小: 2206K
代理商: EP2C20F256I6N
Altera Corporation
4–3
February 2007
Cyclone II Device Handbook, Volume 1
Hot Socketing & Power-On Reset
the power supply can provide current to the device’s VCC and ground
planes. This condition can lead to latch-up and cause a low-impedance
path from VCC to ground within the device. As a result, the device extends
a large amount of current, possibly causing electrical damage.
Altera has ensured by design of the I/O buffers and hot-socketing
circuitry, that Cyclone II devices are immune to latch-up during hot
socketing.
Hot-Socketing
Feature
Implementation
in Cyclone II
Devices
The hot-socketing feature turns off the output buffer during power up
(either VCCINT or VCCIO supplies) or power down. The hot-socket circuit
generates an internal
HOTSCKT signal when either VCCINT or VCCIO is
below the threshold voltage. Designs cannot use the
HOTSCKT signal for
other purposes. The
HOTSCKT signal cuts off the output buffer to ensure
that no DC current (except for weak pull-up leakage current) leaks
through the pin. When VCC ramps up slowly, VCC is still relatively low
even after the internal
POR signal (not available to the FPGA fabric used
by customer designs) is released and the configuration is finished. The
CONF_DONE, nCEO, and nSTATUS pins fail to respond, as the output
buffer cannot drive out because the hot-socketing circuitry keeps the I/O
pins tristated at this low VCC voltage. Therefore, the hot-socketing circuit
has been removed on these configuration output or bidirectional pins to
ensure that they are able to operate during configuration. These pins are
expected to drive out during power-up and power-down sequences.
Each I/O pin has the circuitry shown in Figure 4–1.
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相關代理商/技術參數(shù)
參數(shù)描述
EP2C20F256I8 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone II 1172 LABs 152 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-256
EP2C20F256I8GA 制造商:Altera Corporation 功能描述:
EP2C20F256I8N 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone II 1172 LABs 152 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-256
EP2C20F484C6 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone II 1172 LABs 315 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-256
EP2C20F484C6N 功能描述:FPGA - 現(xiàn)場可編程門陣列 FPGA - Cyclone II 1172 LABs 315 IOs RoHS:否 制造商:Altera Corporation 系列:Cyclone V E 柵極數(shù)量: 邏輯塊數(shù)量:943 內嵌式塊RAM - EBR:1956 kbit 輸入/輸出端數(shù)量:128 最大工作頻率:800 MHz 工作電源電壓:1.1 V 最大工作溫度:+ 70 C 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-256