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LFE26SE-5F484C データシート(PDF) 10 Page - Lattice Semiconductor

部品番号 LFE26SE-5F484C
部品情報  LatticeECP2/M Family Data Sheet
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メーカー  LATTICE [Lattice Semiconductor]
ホームページ  http://www.latticesemi.com
Logo LATTICE - Lattice Semiconductor

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2-7
Architecture
Lattice Semiconductor
LatticeECP2/M Family Data Sheet
Figure 2-5. General Purpose PLL (GPLL) Diagram
Standard PLL (SPLL)
Some of the larger devices have two to six Standard PLLs (SPLLs). SPLLs have the same features as GPLLs but
without delay adjustment capability. SPLLs also provide different parametric specifications. For more information,
please see the list of additional technical documentation at the end of this data sheet.
Table 2-4 provides a description of the signals in the GPLL and SPLL blocks.
Table 2-4. GPLL and SPLL Blocks Signal Descriptions
Signal
I/O
Description
CLKI
I
Clock input from external pin or routing
CLKFB
I
PLL feedback input from CLKOP (PLL internal), from clock net (CLKOP) or from a user clock
(PIN or logic)
RST
I
“1” to reset PLL counters, VCO, charge pumps and M-dividers
RSTK
I
“1” to reset K-divider
CLKOS
O
PLL output clock to clock tree (phase shifted/duty cycle changed)
CLKOP
O
PLL output clock to clock tree (no phase shift)
CLKOK
O
PLL output to clock tree through secondary clock divider
LOCK
O
“1” indicates PLL LOCK to CLKI
DDAMODE
1
I
Dynamic Delay Enable. “1”: Pin control (dynamic), “0”: Fuse Control (static)
DDAIZR
1
I
Dynamic Delay Zero. “1”: delay = 0, “0”: delay = on
DDAILAG
1
I
Dynamic Delay Lag/Lead. “1”: Lead, “0”: Lag
DDAIDEL[2:0]
1
I
Dynamic Delay Input
DPA MODES
I
DPA (Dynamic Phase Adjust/Duty Cycle Select) mode
DPHASE [3:0]
I
DPA Phase Adjust inputs
DDDUTY [3:0]
DPA Duty Cycle Select inputs
1. These signals are not available in SPLL.
Input Clock
Divider
(CLKI)
Feedback
Divider
(CLKFB)
Delay
Adjust
Voltage
Controlled
Oscillator
Post Scalar
Divider
(CLKOP)
Phase/Duty
Select
Secondary
Divider
(CLKOK)
CLKOS
CLKOK
CLKOP
LOCK
CLKFB
CLKI
RST
Dynamic Delay Adjustment
(from routing or external pin)
from CLKOP (PLL internal),
from clock net(CLKOP) or from
a user clock (pin or logic)
Dynamic Adjustment
PLLCAP External Pin
(Optional External Capacitor)
RSTK


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