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2020-1-14 15:59 |
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FPGA导出的IBIS模型如何编辑修改差分的模型？: z+ ]( d; r( `
! C! b8 N( |! K: c7 B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）- j4 r) n" u- g! t' {: D& I
如果只是在IBIS文件上手动添加 差分对管脚是否够用？& Z* |5 Z! v- l' l
[Model] DQ_FULL_800
/ i+ d1 w# ]7 E% N( R0 c1 t- kModel_type I/O0 D1 j# r& c& d7 h. P. l
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$ h7 Z& E4 a U. p2 Y- e# j j- vVinl = 700.000mV3 z2 P! o9 ?1 _$ {) r
Vinh = 1.100V% U1 |) Q- I. W: p
Vmeas = 900.000mV9 V( B/ c4 B/ ~ j& p7 q z
Vref = 900.000mV4 b$ f% s# T! u2 X ]: V
Cref = 0.000pF; i: |5 @ h+ b9 S
Rref = 25.000Ohm9 _( f& D) I! \# y
|" @3 V! h3 ], \/ A3 }$ o: C
| typ min max
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% S# l, _! X$ Y1 oC_comp 2.466pF 2.316pF 2.616pF9 C! o+ j( `; F9 u
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* q. v- M5 o8 ]( k7 a[Model Spec]# a x J" G7 D5 Q% O
| Input threshold voltage corners+ A; i5 u3 {: Q$ ]
Vinl 0.700V 0.650V 0.750V- F- b2 ]/ K, U" v& X/ G# Z
Vinh 1.100V 1.050V 1.150V
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3 M3 T0 J' E. h# c; }6 {| Measurement voltage corners% q& N2 k% z, @+ b2 Q+ o
Vmeas 0.900V 0.850V 0.950V8 B' I: I1 T0 d( P. Q
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/ I' S' l }3 [0 J- a' K| Timing spec test load voltage corners
8 y6 B/ c- G( w& t/ m+ @: GVref 0.900V 0.850V 0.950V' H* A# c! J, \* k$ b
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[Receiver Thresholds] * O& G% R) C7 C5 T2 S; `
Vth = 0.900V- `" e/ m9 z& Z3 r/ s; M- l
Vth_min = 0.882V
& V! R" L/ @% |+ B8 p" D; _Vth_max = 0.918V) J) G' f& Z; \8 \, A' \) q U
Vinh_ac = 0.200V0 p9 c! D% f4 ?9 a- l, q1 f0 M) F2 ~; F
Vinh_dc = 0.125V
2 m( o. h% P' H1 k8 G. rVinl_ac = -0.200V: B2 t( a: a, f0 h5 W- ?3 G# ~
Vinl_dc = -0.125V' G; V' F9 o: ]$ g$ q: g
Tslew_ac = 5.000ns |Not specified, so set to high value6 {5 j+ W( X: m3 |, s: o* J
Threshold_sensitivity = 0.50
; C2 R$ ]9 y/ o2 l. j( S9 OReference_supply Pullup_ref
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[Voltage Range] 1.800V 1.700V 1.900V2 d8 W9 j0 y+ a$ X+ q
[Pullup Reference] 1.800V 1.700V 1.900V; I2 K, Y' K/ O" o" F; m, s' }5 E
| Junction Temperature (Ambient temp is 35C typ, 105C min, -40C max)0 v0 @3 j$ i) I$ J& ^& I8 M
[Temperature Range] 50.0 120.0 -40.0
5 c3 i0 v" P) `0 q|; J7 R* G; ]0 `/ h
|***************************************************************************: w. g$ k! D1 m+ Y- j4 i8 E
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[Model] DQS_FULL_8001 C. x; ]+ s% N& [% o
Model_type I/O4 W- ^8 r3 O- E
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. V6 s) C4 \4 K* n0 QVinl = 700.000mV
: N2 i0 h) j) I3 h5 ^Vinh = 1.100V
( t" F" ]* }" J( U& H T7 EVmeas = 900.000mV
7 ]4 @ s' `' q- lVref = 900.000mV
9 t. A5 F4 `* [0 \4 w( kCref = 0.000pF! D q; ^2 i- F2 H7 a' \7 Q
Rref = 25.000Ohm4 `9 O1 D/ }; Z3 ]) A5 ~
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| typ min max
) i2 i% e, M1 K; |9 _& f|# s3 A" d* \" V0 v Y
C_comp 2.466pF 2.316pF 2.616pF
3 r: I1 |6 H# \; e/ e, t# X7 I# d|- v6 M# w2 u) w- T+ d
[Model Spec]) B, P1 k2 X' z* ?2 L& d6 e
| Input threshold voltage corners4 E9 t+ X. s. i. \7 J
Vinl 0.700V 0.650V 0.750V
9 R, P% a8 ?+ o0 y- sVinh 1.100V 1.050V 1.150V
6 v- ?0 _8 a) x. O4 {6 c( y2 d* p|. D9 Q7 v2 x; t8 P$ V) O6 `% @0 a8 @
| Measurement voltage corners0 h' k1 W4 @4 Z( Z) |
Vmeas 0.900V 0.850V 0.950V
& v$ V# O9 ?% q7 E' B|
( b4 Y7 Z9 |2 C| Timing spec test load voltage corners
* K( D5 B, P2 L' B W. QVref 0.900V 0.850V 0.950V* R3 ^: x4 @, x" s+ V3 M. T
|( Y8 N) `& |0 |/ e4 u. I/ M m
[Receiver Thresholds] 6 @2 ?& F+ C: p! _: e
|Vth = 0.900V
+ f4 ~: M+ Z; F1 P|Vth_min = 0.882V5 `( }0 q ~6 F. P. h0 t8 ~+ j
|Vth_max = 0.918V
5 q# c3 U$ w: K+ t m; G: v|Vinh_ac = 0.200V) b/ L6 T2 \) J8 y9 S/ ^/ D
|Vinh_dc = 0.125V0 i% y+ }, @) V! `. S' _; E9 c
|Vinl_ac = -0.200V
+ X+ h) B2 r9 H|Vinl_dc = -0.125V; w7 b8 j7 U' v- d0 t# e1 X
|Tslew_ac = 5.000ns |Not specified, so set to high value
* L& O, u* g' g% |1 Y|Threshold_sensitivity = 0.50
8 Z5 k$ L/ S2 |, s% @2 K|Reference_supply Pullup_ref
( ?. B' H* Y, X1 e3 b|
' t/ h1 ~+ o. M2 J9 ~, g1 \$ a|NOTE: If using the IBISCHK 4.2.1 or older parser, Differential receiver / l9 a2 E; u0 l0 T8 C: _
|threshold parameters must be commented out because the parser generates
8 _0 [9 _' `2 {" L! `|errors for multiple differential models.% ^1 ~$ `& p/ |. Q, Z+ C/ J0 p
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1 {7 _1 p# O6 G6 [. e+ kVcross_low = 0.675V6 E8 T- v9 B9 D( S7 E) Y% E7 J) U
Vcross_high = 1.125V0 s* o/ m y7 |8 G' W$ m
Vdiff_ac = 500mV
8 N' ?' s- U8 h3 lVdiff_dc = 250mV$ o1 W3 T" u, d. u
Tdiffslew_ac = 5.000ns |Not specified, so set to high value
# Q8 X7 R x$ C" g6 b|; o$ d( x2 _ ~0 D# q
[Voltage Range] 1.800V 1.700V 1.900V
' K. f1 }0 n6 W! ^8 Q ][Pullup Reference] 1.800V 1.700V 1.900V. d& v/ ~' P7 i; ]! M
| Junction Temperature (Ambient temp is 35C typ, 105C min, -40C max)
! ^+ M: L2 l- v9 \# c[Temperature Range] 50.0 120.0 -40.0* ?" R9 d: M6 C% ?
|, S8 G; _/ d! D- Z0 _' T
|***************************************************************************7 _3 h9 \9 L! B: u
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/ {1 J3 b! I+ e2 O' `# P. y$ t/ n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$ r0 v1 j, P7 q4 a8 ?
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7 V2 e7 h; h1 }" e& a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" [! |) N$ h& J! L8 j8 \
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4 @; X8 Y# f0 A G& O[Model Selector] DQ4 R0 y& I/ k3 \' v0 V; z
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DQ_SSTL18_II_F_HR2 H, [1 D" o4 `; u; T6 e1 i
DQ_SSTL18_II_S_HR* _& f" l% N# ~3 l# A8 m/ J* [
DQ_SSTL18_II_F_HR_IN503 R p3 _$ u i0 a* l8 M* @& e
DQ_LVCMOS18_F_4_HR d* S% U/ E* } X6 S( p( G( l" P1 D
DQ_LVCMOS18_F_8_HR
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[Model Selector] DQS. G% k- x: ]# a& k, v
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: f3 S( m7 j+ @' ^- J! YDQS_SSTL18_II_F_HR
( V: B' y7 Q% }* DDQS_SSTL18_II_F_HR_IN501 F& W# d0 Q2 l! |0 O/ J! ?
) S$ Y, F1 d& G, Z6 Q5 eibis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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