参数资料
型号: EP1K50TI144-3F
英文描述: Field Programmable Gate Array (FPGA)
中文描述: 现场可编程门阵列(FPGA)
文件页数: 31/86页
文件大小: 1263K
代理商: EP1K50TI144-3F
Altera Corporation
37
ACEX 1K Programmable Logic Device Family Data Sheet
Development
13
Tools
For designs that require both a multiplied and non-multiplied clock, the
clock trace on the board can be connected to the GCLK1 pin. In the Altera
software, the GCLK1 pin can feed both the ClockLock and ClockBoost
circuitry in the ACEX 1K device. However, when both circuits are used,
the other clock pin cannot be used.
ClockLock & ClockBoost Timing Parameters
For the ClockLock and ClockBoost circuitry to function properly, the
incoming clock must meet certain requirements. If these specifications are
not met, the circuitry may not lock onto the incoming clock, which
generates an erroneous clock within the device. The clock generated by
the ClockLock and ClockBoost circuitry must also meet certain
specifications. If the incoming clock meets these requirements during
configuration, the ClockLock and ClockBoost circuitry will lock onto the
clock during configuration. The circuit will be ready for use immediately
after configuration. Figure 19 shows the incoming and generated clock
specifications.
Figure 19. Specications for the Incoming & Generated Clocks
Note:
(1)
The tI parameter refers to the nominal input clock period; the tO parameter refers to the nominal output clock
period.
Input
Clock
ClockLock
Generated
Clock
tCLK1
tINDUTY
tI+ tCLKDEV
tR
tF
tO
tI+ tINCLKSTB
tO
tO tJITTER
tO+ tJITTER
tOUTDUTY
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