Notes to Table 16: (1) To implement the ClockLock and ClockBoost cir" />
參數(shù)資料
型號(hào)： EP20K30EQC208-1
廠商： Altera
文件頁數(shù)： 66/117頁
文件大?。?/td> 0K
描述： IC APEX 20KE FPGA 300K 208-PQFP
標(biāo)準(zhǔn)包裝： 24
系列： APEX-20K®
LAB/CLB數(shù)： 120
邏輯元件/單元數(shù)： 1200
RAM 位總計(jì)： 24576
輸入/輸出數(shù)： 125
門數(shù)： 113000
電源電壓： 1.71 V ~ 1.89 V
安裝類型： 表面貼裝
工作溫度： 0°C ~ 85°C
封裝/外殼： 208-BFQFP
供應(yīng)商設(shè)備封裝： 208-PQFP（28x28）
52
Altera Corporation
APEX 20K Programmable Logic Device Family Data Sheet
Notes to Table 16:
(1)
To implement the ClockLock and ClockBoost circuitry with the Quartus II software, designers must specify the
input frequency. The Quartus II software tunes the PLL in the ClockLock and ClockBoost circuitry to this frequency.
The fCLKDEV parameter specifies how much the incoming clock can differ from the specified frequency during
device operation. Simulation does not reflect this parameter.
(2)
Twenty-five thousand parts per million (PPM) equates to 2.5% of input clock period.
(3)
During device configuration, the ClockLock and ClockBoost circuitry is configured before the rest of the device. If
the incoming clock is supplied during configuration, the ClockLock and ClockBoost circuitry locks during
configuration because the tLOCK value is less than the time required for configuration.
(4)
The tJITTER specification is measured under long-term observation.
Tables 17 and 18 summarize the ClockLock and ClockBoost parameters
for APEX 20KE devices.
Table 17. APEX 20KE ClockLock & ClockBoost Parameters
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
tR
Input rise time
5ns
tF
Input fall time
5ns
tINDUTY
Input duty cycle
40
60
%
tINJITTER
Input jitter peak-to-peak
2
% of input
period
peak-to-
peak
tOUTJITTER
Jitter on ClockLock or ClockBoost-
generated clock
0.35
% of
output period
RMS
tOUTDUTY
Duty cycle for ClockLock or
ClockBoost-generated clock
45
55
%
tLOCK (2), (3)
Time required for ClockLock or
ClockBoost to acquire lock
40
s
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