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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:
. A) ^# C' x7 ~5 d/ n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!
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LIBRARY ieee;( [9 W5 a1 S7 v+ n0 P
USE ieee.std_logic_1164.all;
6 V( q! r9 G0 e- F9 u0 v# e7 iUSE ieee.std_logic_arith.all; M5 o6 v, a7 s( k
; s. t, l1 B3 u6 q: w# ZENTITY memory_64 IS
+ v! i3 Z* Z# X PORT(
$ T9 ]6 M) i( H1 `5 ` mem_in : IN std_logic_vector ( 5 DOWNTO 0 );' N: J( w: u* {( c6 H L" `
mem_out : OUT std_logic_vector ( 5 DOWNTO 0 );. Y7 ]/ C2 g% b4 p3 [- D' @8 l
clr_l : IN std_logic;
6 ^" }$ l& |( B0 O mem_addr : IN std_logic_vector ( 5 DOWNTO 0 )# s6 o* A2 I4 t) H" V
);6 l* ^& {% t% A0 M2 y1 ^3 t
2 P5 N$ M- a R3 N3 z* O-- Declarations$ L& X" U& @' X4 e: k
2 ]; y9 D- p2 kEND memory_64 ;
/ ]5 X T5 Z( Z; f% B
5 R) _! o- T) K5 G--
4 E7 c4 w+ N2 u# q+ J* N3 K. UARCHITECTURE arch OF memory_64 IS' G, e! r' f- y$ `/ h
-- column decoder7 M7 ?. E3 L Y# d. H, m
component mem_coldec( {" J- E& G( Y Y3 C1 A
PORT( 6 ?/ f$ m# J$ N+ m
col_addr : IN std_logic_vector ( 2 DOWNTO 0 );# t: ?; [: t! W+ T H! ?% N( O& v2 [
col_sel : OUT std_logic_vector ( 7 DOWNTO 0 ). E/ F! N; ]- e" @5 {; ?
);$ g$ E8 h! d$ z' X
end component;
* ?! c# d4 `8 s" T-- row decoder1 \2 s0 Y4 @& S& l
component mem_rowdec
1 Q# e" c& U# H3 Z, u$ b6 m3 P PORT( $ [' }( x9 b" i
row_addr : IN std_logic_vector ( 2 DOWNTO 0 );" f" `. j! x i6 w3 b% y
row_sel : OUT std_logic_vector ( 7 DOWNTO 0 )
) `/ e2 H- P- G( K! |8 a- l );% f0 v' Y& V; Q6 C
end component;
5 X; K# q N' F: s0 Y' f+ M& g-- latch array : A @2 B8 z8 I* z
component latch_cell
( ^' n, Y) }- U3 y PORT(
; |0 v& g3 `- z; [# x, A5 H clr_l : IN std_logic;
: P, z4 _: e' ^ col_sel : IN std_logic;, q/ m# n5 ?3 n2 T( A9 J, H3 j
row_sel : IN std_logic;
# C$ v3 H7 Y& T data_in : IN std_logic_vector ( 5 DOWNTO 0 );
; I3 `9 X: m1 E data_out : OUT std_logic_vector ( 5 DOWNTO 0 )1 V) A+ `2 h4 ^
);: P: q& o' r- Y+ o8 G
end component; ! @1 h5 G$ ~, @$ n' y5 X
( n4 g- e0 P/ w4 i$ U; usignal smem_out : std_logic_vector ( 5 downto 0 );1 D* o$ _! g& u7 V7 T& r
signal scol_sel,srow_sel : std_logic_vector( 7 downto 0 );
]- w* P; R- E/ _- dBEGIN. l+ j" ~; W; B
u_0 : mem_coldec port map(mem_addr( 5 downto 3 ),scol_sel);
/ Y2 A+ o3 `" o6 a' O% p u_1 : mem_rowdec port map(mem_addr( 2 downto 0 ),srow_sel);7 t) O+ I+ B/ q/ G; C1 u
g0 : for i in 0 to 7 generate -- column generate
( Y, r5 g' {2 K* d( Q g1 : for j in 0 to 7 generate -- row generate
; C: a2 f- t0 x, P% Z; r7 L u_2 : latch_cell port map(clr_l,scol_sel(j),srow_sel(i),mem_in,smem_out);, D8 t# g+ P* o5 a+ x! {
end generate;8 x: Y$ A( h' @8 N: o! D* k9 J$ D
end generate;
5 l% w- h8 [. h1 XEND ARCHITECTURE arch; |
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