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FPGA导出的IBIS模型如何编辑修改差分的模型？
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发现导出来的默认没有差分定义的模型（虽然IO分配上定义差分对）3 t# l8 E8 R' _+ A, R
如果只是在IBIS文件上手动添加 差分对管脚是否够用？7 v, g% [7 f s* H8 ^' a" |
[Model] DQ_FULL_8009 `' l) L. p' g. j4 W; l$ Y
Model_type I/O3 M& u; }. R ?/ p: ]
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Vinl = 700.000mV
9 |6 E! L" g! T: K7 ^; QVinh = 1.100V4 x2 `5 u9 y# f# G; ]
Vmeas = 900.000mV
0 j( w7 P8 a& c' R/ S, Q( mVref = 900.000mV
" J9 S% P) c+ |4 J' N5 Q3 zCref = 0.000pF
9 |2 M6 J H6 T* lRref = 25.000Ohm" `# q1 u6 s- t: O* U/ P6 d" V2 M
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( R' O2 R7 r n1 {! J" J9 m| typ min max
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& m* t- b" V: PC_comp 2.466pF 2.316pF 2.616pF/ N$ Z" p% s# R% n
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* z% d* V( c# d- c* n- l[Model Spec]
5 _3 e5 m! G; i: I# H| Input threshold voltage corners
6 w! z& e. y( {0 m! M# HVinl 0.700V 0.650V 0.750V. [7 a7 w* d" f9 }3 O1 X
Vinh 1.100V 1.050V 1.150V; b7 d7 J% ^& B: r5 F0 W6 Z( w
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! n2 c& {& G7 d0 A| Measurement voltage corners
. v7 ?& } ? i j, t; zVmeas 0.900V 0.850V 0.950V
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| Timing spec test load voltage corners
5 d# z$ F. e% J0 CVref 0.900V 0.850V 0.950V8 M( b- l) M6 W$ S" T; h; i0 N- k5 f
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[Receiver Thresholds] + I) V. A x. A+ @5 {# n4 R
Vth = 0.900V
# i- b6 B* q( {Vth_min = 0.882V/ K" n8 o8 a5 X$ t! z
Vth_max = 0.918V
/ q2 F2 c* L9 d! p x1 [' pVinh_ac = 0.200V
# g* E/ R/ ?- `6 d' r8 gVinh_dc = 0.125V+ w, y: Q4 _) r7 {5 P
Vinl_ac = -0.200V8 R% h3 f7 ]: O: O. H1 m
Vinl_dc = -0.125V7 L6 x. b c/ g5 l+ T
Tslew_ac = 5.000ns |Not specified, so set to high value
* \* a0 j! I; U8 u( v( y/ O- `Threshold_sensitivity = 0.505 g: V7 D$ m; J8 H% j
Reference_supply Pullup_ref
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/ X) [% q3 k( S0 t& C* t o8 \[Voltage Range] 1.800V 1.700V 1.900V) Q) b# V! D% G2 y8 d* k# f- Q
[Pullup Reference] 1.800V 1.700V 1.900V
. D' z/ q. ^& E4 [7 v% ]| Junction Temperature (Ambient temp is 35C typ, 105C min, -40C max)
, C% V8 R5 D7 k' p* v; A1 A! V8 ^[Temperature Range] 50.0 120.0 -40.0) k' D/ w8 _$ v& |5 B
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# k7 F, m1 V8 X7 ^* J/ g|***************************************************************************
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[Model] DQS_FULL_800
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/ ]0 e; V+ T. aVinl = 700.000mV
/ R3 w8 Q. u+ j) IVinh = 1.100V
) }2 u+ ]. S' g$ @1 s( u, e# qVmeas = 900.000mV& V& o8 l$ W3 X% g: ]4 y
Vref = 900.000mV% S, p3 Y7 p& t8 L+ r3 p# r9 X
Cref = 0.000pF
# [& z9 w1 P. y% A) uRref = 25.000Ohm
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| typ min max' i: Q1 |8 N, v( q- z
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; W7 p$ k* w# z, R: F3 j) ^6 e# |C_comp 2.466pF 2.316pF 2.616pF
0 R0 w9 u9 e7 ]|
) B$ l; J5 `/ k/ n% b5 q[Model Spec]
& C$ j/ g; c! c| Input threshold voltage corners% g+ ~0 I% G# Y( k0 D; W
Vinl 0.700V 0.650V 0.750V
, e% v4 Y7 t% J. \& E5 `Vinh 1.100V 1.050V 1.150V
8 S6 D* ]; \& l! d" W|8 V$ L) D) M2 [4 D! X+ O
| Measurement voltage corners% J' R) [9 r2 z
Vmeas 0.900V 0.850V 0.950V+ N( r' h1 f8 \- q5 n1 t1 ]: j
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1 L: e0 g/ s8 }6 }| Timing spec test load voltage corners8 C( t& y. b9 Q- e
Vref 0.900V 0.850V 0.950V6 |3 D4 N3 o Y% R6 S9 A
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Q7 h6 @) ]; o5 T' p# N[Receiver Thresholds] 2 X! s" Y4 j- w) Z
|Vth = 0.900V: \6 I( L9 J8 O/ {# c
|Vth_min = 0.882V0 A( t: M) i. s5 o3 U. C
|Vth_max = 0.918V+ ~* t7 A2 S: z" X/ i
|Vinh_ac = 0.200V8 L8 A8 F" ` S: ?
|Vinh_dc = 0.125V
5 T1 C( J. e# ~, _- E! M|Vinl_ac = -0.200V4 `/ }6 K" B7 h! L; x2 A
|Vinl_dc = -0.125V8 m: T" C0 q4 \+ d) X9 C8 J0 D8 E$ r
|Tslew_ac = 5.000ns |Not specified, so set to high value
, M5 y" j4 O( G2 c|Threshold_sensitivity = 0.50
$ r: n* @+ N8 O$ x7 W- m|Reference_supply Pullup_ref
0 i; C( W- F5 q& ~ b. n! I|; l/ {0 X( T" k4 Q# c( B
|NOTE: If using the IBISCHK 4.2.1 or older parser, Differential receiver 4 a+ J Z& F5 K5 Q' [
|threshold parameters must be commented out because the parser generates; d" d. u& Q3 y- ^% h" o
|errors for multiple differential models.6 E% [6 @; s' [; j, I9 D
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. u6 B' n! O% k5 X1 K+ R1 b/ HVcross_low = 0.675V
- K% M& S3 Q" c, V* JVcross_high = 1.125V
1 m) e" `3 ^. l0 C6 ^6 M9 [: iVdiff_ac = 500mV1 H) |! [% f/ m+ m
Vdiff_dc = 250mV: z2 ^. a3 K/ U
Tdiffslew_ac = 5.000ns |Not specified, so set to high value. m1 i |& s* G- J/ e
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9 K( J! m) J7 w$ e8 @[Voltage Range] 1.800V 1.700V 1.900V
+ Z. u! {' X! a4 t V[Pullup Reference] 1.800V 1.700V 1.900V
! }5 f$ F/ l( B& z( S| Junction Temperature (Ambient temp is 35C typ, 105C min, -40C max)
/ ?% M3 L) _" n& N$ R, j7 n[Temperature Range] 50.0 120.0 -40.0
; O; M J- E. w- h% R! a|" L# L" c) s% t4 } I! {) n
|***************************************************************************8 G, u, D4 y1 t6 M8 T
|5 \( t; H# o/ l8 T3 X' Y
' E& B% U" [! \' R% K) {; e这是从 美光DDR2的IBIS模型里面截取出来的，对着DQ与DQS在模型上的定义% O0 o4 H# ~" \5 N
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4 b9 C& E$ t( F====================================================================================& I: ?# ^% i Y V
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+ j8 X: e9 O3 g r$ a" R8 E) v手动修改编辑成下面的这样的时候发现编辑器会提示错误
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[Model Selector] DQ( U) s- X$ o4 u$ ~
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DQ_SSTL18_II_F_HR
# \& ] O+ G5 ?9 qDQ_SSTL18_II_S_HR
3 E8 R( l/ C9 `% EDQ_SSTL18_II_F_HR_IN50
1 E6 H: i7 {' m# X6 ]2 Q3 dDQ_LVCMOS18_F_4_HR4 @: O1 d3 l3 {
DQ_LVCMOS18_F_8_HR
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[Model Selector] DQS. g- R; v3 F- X$ H% |+ K. O
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DQS_SSTL18_II_F_HR [% Q6 u2 c' D# h
DQS_SSTL18_II_F_HR_IN50
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ibis编辑器检查的时候发现提示的错误是：incorrect number of line items for keyword model selector expecting 2
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发表于 2020-3-20 10:48
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