lfe2-12e-5f484i Lattice Semiconductor Corp., lfe2-12e-5f484i Datasheet - Page 10
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lfe2-12e-5f484i
Manufacturer Part Number
lfe2-12e-5f484i
Description
Latticeecp2/m Family Data Sheet Introduction
Manufacturer
Lattice Semiconductor Corp.
Datasheet
1.LFE2-12E-5F484I.pdf
(385 pages)
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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
CLKI
CLKFB
RST
RSTK
CLKOS
CLKOP
CLKOK
LOCK
DDAMODE
DDAIZR
DDAILAG
DDAIDEL[2:0]
DPA MODES
DPHASE [3:0]
DDDUTY [3:0]
1. These signals are not available in SPLL.
from clock net(CLKOP) or from
(from routing or external pin)
from CLKOP (PLL internal),
a user clock (pin or logic)
Signal
1
1
1
1
CLKI
CLKFB
RST
RSTK
I/O
—
O
O
O
O
I
I
I
I
I
I
I
I
I
I
Input Clock
Feedback
(CLKFB)
Divider
Divider
(CLKI)
Clock input from external pin or routing
PLL feedback input from CLKOP (PLL internal), from clock net (CLKOP) or from a user clock
(PIN or logic)
“1” to reset PLL counters, VCO, charge pumps and M-dividers
“1” to reset K-divider
PLL output clock to clock tree (phase shifted/duty cycle changed)
PLL output clock to clock tree (no phase shift)
PLL output to clock tree through secondary clock divider
“1” indicates PLL LOCK to CLKI
Dynamic Delay Enable. “1”: Pin control (dynamic), “0”: Fuse Control (static)
Dynamic Delay Zero. “1”: delay = 0, “0”: delay = on
Dynamic Delay Lag/Lead. “1”: Lead, “0”: Lag
Dynamic Delay Input
DPA (Dynamic Phase Adjust/Duty Cycle Select) mode
DPA Phase Adjust inputs
DPA Duty Cycle Select inputs
Dynamic Delay Adjustment
Adjust
Delay
2-7
Controlled
Oscillator
Voltage
(Optional External Capacitor)
PLLCAP External Pin
Description
Post Scalar
(CLKOP)
LatticeECP2/M Family Data Sheet
Divider
Dynamic Adjustment
Phase/Duty
Secondary
(CLKOK)
Divider
Select
Architecture
CLKOK
CLKOP
CLKOS
LOCK
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