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各位VHDL高手們,小弟寫了個6 X 64的記憶體,不過我試用實際的硬體電路來思考,並非使用軟體陣列的方式,如下:
* _; W' |6 o0 j' i" ?4 V我設計了一個decoder for column address selection,一個decoder for row address selection,然後使用generate產生64個latch陣列,但是現在我不知道該如何指定我的腳位,懇請各位給點意見,謝謝!
# R; C* J2 x; I. Q# [7 o$ U( h- ^) c# }' i
LIBRARY ieee;
8 ?/ @7 x0 X: b8 a2 s, wUSE ieee.std_logic_1164.all;# G, I9 F) Q9 a, h j. r" U
USE ieee.std_logic_arith.all;
% j5 g0 G+ {& ~ [( }7 B. B6 g/ R. F, N
ENTITY memory_64 IS
. e1 [ I$ ]6 B( A/ B: o PORT(
3 `) v: q3 u. h7 g mem_in : IN std_logic_vector ( 5 DOWNTO 0 );! s0 c* [8 E e
mem_out : OUT std_logic_vector ( 5 DOWNTO 0 );
; F1 s) u+ X1 V% c4 S clr_l : IN std_logic;, X2 |6 ~/ H! c! j8 {% U
mem_addr : IN std_logic_vector ( 5 DOWNTO 0 )
$ W7 `% B6 v1 c2 p9 J& b );
i8 P. f; f$ ^
* k6 V: v5 Q& q, ]% n-- Declarations) b$ n: x- H+ F n5 v( z# z
7 t \/ @; i) B- `* y6 Q p1 MEND memory_64 ;; q" e* b. A% Y, l+ h- Y
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--* B+ m# m4 F% f4 P- I
ARCHITECTURE arch OF memory_64 IS
6 \( t, [& o7 m& s* M-- column decoder
! N. R; ?* I2 kcomponent mem_coldec
# T3 {; Q0 e1 a4 B* O9 b% f; o$ } PORT( 6 K" C: w! X/ x' `& q+ x
col_addr : IN std_logic_vector ( 2 DOWNTO 0 );
) [' W' e3 m. E7 s# U col_sel : OUT std_logic_vector ( 7 DOWNTO 0 )
" |) l: g5 I+ Z* r4 i/ a( `8 s );% @+ C. } V- d8 \
end component;
7 j5 s; I4 J4 d% [* ?-- row decoder+ _7 Q u4 q) f. Y; b9 l+ x( y
component mem_rowdec
9 x$ Y! j8 A& M/ ^ PORT(
- k1 P% C5 d5 ]% r& S row_addr : IN std_logic_vector ( 2 DOWNTO 0 );( l+ l6 H M0 o- Z6 k- J% {: f
row_sel : OUT std_logic_vector ( 7 DOWNTO 0 )- W4 `( @- x6 f
);* h5 w! z) W( \9 T2 M3 c T7 v2 N. p' w
end component;
( X" e, `0 J/ P" _* m; x2 F: Q) O- v-- latch array # e$ p/ g7 @( B+ N& O5 t
component latch_cell" N' F1 P- ^1 k- c8 G
PORT(
7 b( t3 `. L+ h5 j" @ clr_l : IN std_logic;" E/ p+ ?2 c# Z: G, F
col_sel : IN std_logic;
' E9 ?- W7 q" Z8 ^7 @/ l row_sel : IN std_logic;
. J" {6 U( M8 r( W data_in : IN std_logic_vector ( 5 DOWNTO 0 );( y2 r) ^" L' c* H; v _. p
data_out : OUT std_logic_vector ( 5 DOWNTO 0 )% L A: ^0 A! D' `
);
6 g; ~: S6 A* d; c' |end component; / I- d# b. U1 w7 j1 |
% W5 v) f7 B, d, q7 C3 @( D6 ksignal smem_out : std_logic_vector ( 5 downto 0 );
0 c* }5 f( |. I- j/ `signal scol_sel,srow_sel : std_logic_vector( 7 downto 0 );
; x. f. y E6 `7 R" ?BEGIN+ u+ T& Q O: a. C( z/ b
u_0 : mem_coldec port map(mem_addr( 5 downto 3 ),scol_sel);
6 F8 p8 t+ e2 P# X1 u+ x u_1 : mem_rowdec port map(mem_addr( 2 downto 0 ),srow_sel);& i. ]; t! Z$ j6 X: B
g0 : for i in 0 to 7 generate -- column generate1 t; D$ j' p+ J9 B7 I% l2 u# s
g1 : for j in 0 to 7 generate -- row generate
) K; \- o1 |+ U, y$ X5 W; `& W/ { u_2 : latch_cell port map(clr_l,scol_sel(j),srow_sel(i),mem_in,smem_out);
7 d8 T _7 I8 d. q @" B end generate;2 d$ a1 S o0 T
end generate;8 V5 q( V6 q9 `' s
END ARCHITECTURE arch; |
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