參數(shù)資料
型號: LR4500
廠商: LSI Corporation
英文描述: Superscalar Microprocessor(超標量微處理器)
中文描述: 超標量微處理器(超標量微處理器)
文件頁數(shù): 21/172頁
文件大?。?/td> 1142K
代理商: LR4500
PLL Clock Circuit
2-5
detects the asserted signal and then asserts the bus hold request to the
CW4011. The CW4011 asserts the grant signal to the SCLC module,
and the SCLC module then asserts the hold acknowledge signal to the
Lbus device.
'SCbus and Local I/O Bus Converter Module"
provides
detailed information about the Lbus.
2.4 PLL Clock Circuit
The PLL circuit is an LSI Logic PLL cell (
pllpgmcb
) part that drives the
clock signals to the CW4011 shell and the other modules that are part
of the LR4500. The system clock, SCLKp, drives the PLLREFp input.
Figure 2.1
on
page 2-2
shows the relationship between the PLL circuit
and the other LR4500 modules.
Figure 2.2
shows the layout of the
LR4500 PLL circuit.
When using the PLL circuit, you must observe the following design
requirements:
Provide capacitance devices.
Provide a resistor between PLLLP2p and PLLAGND.
Connect other PLL circuit inputs to V
DD
or GND.
Leave PLLCTop outputs open.
For more information about the PLL circuit, refer to the LSI Logic
G10
-p Cell-Based ASIC Products Design Manual and G10-p
Cell-Based ASIC Products Databook
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