|
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:/ z2 _# |& W! |# o% j2 o
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!
: J# `% `0 r* r! _3 L- B
& r. @. U, [& w9 h' v% y; ?: ILIBRARY ieee;
7 z1 Q% g/ J, aUSE ieee.std_logic_1164.all;
9 i! o1 H0 f* T% X: yUSE ieee.std_logic_arith.all;1 i+ ?0 H5 y7 k" e/ E
, k( K- f+ [7 `& }7 lENTITY memory_64 IS
3 ] N* s0 V# E( O PORT( ' N2 t+ O. J* i" {+ T; ?: o
mem_in : IN std_logic_vector ( 5 DOWNTO 0 );$ R D y$ ~% v/ j2 `
mem_out : OUT std_logic_vector ( 5 DOWNTO 0 );
8 I: ?$ g6 w1 p0 l% E8 b clr_l : IN std_logic;- Q# D0 b* @$ o
mem_addr : IN std_logic_vector ( 5 DOWNTO 0 ); h( t; N. H' m+ S( ]- K# b
);
# l, r. C# |! R6 ~
4 C( p- H- M6 \: t-- Declarations R) K& k# m' Q0 I) o' S
7 G6 d* }" ^: o) PEND memory_64 ;
) d! t |% w' W' [& M; y5 E6 r0 J
; f: ^. _) ~7 K--
w# D$ h3 j4 o' gARCHITECTURE arch OF memory_64 IS
" x6 {- w8 n- X7 K: c" A-- column decoder
4 C7 y O1 U" |0 x& m, h( Pcomponent mem_coldec: A: T! e' I/ } O& b6 c- X& C
PORT( a) F: o: k, ?7 N
col_addr : IN std_logic_vector ( 2 DOWNTO 0 );3 k% S5 I" `3 ~7 ?! U# ~: `
col_sel : OUT std_logic_vector ( 7 DOWNTO 0 ) J' H2 @5 W; y/ Z% \% q" i2 A
);: D& J7 ?9 h6 I9 G
end component;
6 F" y" g0 s$ ~-- row decoder8 t& G8 g- {8 I/ x" @2 }
component mem_rowdec8 d5 h+ K1 X- U3 Y$ \( O. [
PORT(
; K9 z( T+ ~ a row_addr : IN std_logic_vector ( 2 DOWNTO 0 );
5 n! N: k) a9 P4 I9 P: S0 G' t row_sel : OUT std_logic_vector ( 7 DOWNTO 0 )
& H% j& A' o3 S6 j3 P );
. v. `. b4 I+ Bend component;
' b. R5 \; m C! D! F# v" ]! ~ f$ t-- latch array : c5 r$ H. W: ~( I
component latch_cell
4 m; A( K# w) ]6 b9 |$ R# c- [7 R8 A PORT(
7 {; k' a3 S. c" s6 j7 ? clr_l : IN std_logic;
) W6 Y8 v3 U7 H, g4 b col_sel : IN std_logic;
6 k( W+ {: h2 S+ I row_sel : IN std_logic; ! h) F D7 R) l3 e( u* Y
data_in : IN std_logic_vector ( 5 DOWNTO 0 );
5 p$ I' X! M+ W$ d, } data_out : OUT std_logic_vector ( 5 DOWNTO 0 )" B/ E1 | O# {' Y
);
, Q3 u) S6 l' D, m7 y3 q" eend component;
* s- x0 S+ r+ G/ J0 f
0 ~3 q8 j5 F5 ` f# esignal smem_out : std_logic_vector ( 5 downto 0 ); e1 T. z3 e) o/ k. y- i5 S/ F
signal scol_sel,srow_sel : std_logic_vector( 7 downto 0 );2 g/ R' m$ ]/ R" a6 |. f7 q
BEGIN
/ N! h$ Q, s$ l, B: d1 m, h4 k+ Q* K u_0 : mem_coldec port map(mem_addr( 5 downto 3 ),scol_sel);& h( X* e' S# x6 {+ n9 m% Z% \$ z
u_1 : mem_rowdec port map(mem_addr( 2 downto 0 ),srow_sel);
% i5 m2 G7 w2 R8 v8 V. B+ Y, R/ A g0 : for i in 0 to 7 generate -- column generate
( C) b2 u$ R( L1 S g1 : for j in 0 to 7 generate -- row generate' W1 u3 \; t# }2 j) J4 i
u_2 : latch_cell port map(clr_l,scol_sel(j),srow_sel(i),mem_in,smem_out);9 h7 w, F! ^- U1 Q
end generate;
2 B: j/ E" j- y7 }0 S( W' } end generate;
8 L1 p& K5 R3 w# t* }9 D' G' ]) YEND ARCHITECTURE arch; |
|