|
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:6 H \) ?: o/ N0 }2 }. O. J& Q
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!
- ?) m- Y H3 k# @
* ~1 k4 u! M; e( cLIBRARY ieee;' i" m7 R/ I( _# d6 e
USE ieee.std_logic_1164.all;
4 R" m# t% U2 g9 }% UUSE ieee.std_logic_arith.all;
" m8 Z- f( w+ `5 R2 @
9 s4 Q! ?2 p5 q& qENTITY memory_64 IS
. T5 ]( R# l% B7 H: D PORT(
2 V( b) I$ y- \9 l. |9 c6 k mem_in : IN std_logic_vector ( 5 DOWNTO 0 );
5 z. }; g9 M/ G, [) d mem_out : OUT std_logic_vector ( 5 DOWNTO 0 );
2 i" o) ^# S' q8 @3 Q clr_l : IN std_logic;0 Z, @$ S( t x# f
mem_addr : IN std_logic_vector ( 5 DOWNTO 0 )0 F# d7 e# p9 i. `& j
);
( e( U2 H' C2 L5 B0 |8 c( \4 z \; b. T# Q" J" Q+ J
-- Declarations5 ?* M0 U6 u! H+ y8 {
# Z9 d- N( F! C* a3 O
END memory_64 ;4 o9 D4 s: w* S" p9 p% n
) M! s! B( c7 Y, k: A--& ~; i8 ?" i7 Y5 h) t8 A
ARCHITECTURE arch OF memory_64 IS5 f3 n' E- r" q$ J2 l- u
-- column decoder
+ f; f; @& X3 e! icomponent mem_coldec
% _, o- z+ B0 a* @" O PORT( 9 \3 w8 P, z& R, o- G( x$ n$ O
col_addr : IN std_logic_vector ( 2 DOWNTO 0 );3 Z* g1 P/ f5 p* ^5 e+ S
col_sel : OUT std_logic_vector ( 7 DOWNTO 0 )* q1 G% O6 A% S
);+ w% k! B$ G' S7 C" t; }
end component;3 |6 M6 {/ D4 a6 D( n
-- row decoder4 V# }; y9 D0 b1 T
component mem_rowdec
, [: L- y. c* _* V( G) v PORT( 0 \& W8 B; ?. ?8 k/ ]- m- q' Y
row_addr : IN std_logic_vector ( 2 DOWNTO 0 ); n$ j' h( s" E, L! Q5 t# ?+ R
row_sel : OUT std_logic_vector ( 7 DOWNTO 0 )) }6 n' `& D; s8 Z9 F
);$ [9 a1 w3 V& Z4 e
end component;
" ?: J8 d$ j3 R" t) J8 x-- latch array # D6 Y6 e, d- P+ S
component latch_cell
( v7 g' m( I5 L PORT(
$ f& c8 z$ |+ o# k+ p3 d2 }3 C clr_l : IN std_logic;
9 a J8 x2 e" O L. m1 v6 O# [ col_sel : IN std_logic;
3 ~* {5 X; v. s+ A: U, Q$ u row_sel : IN std_logic; * m& E5 J' N7 v& }! \
data_in : IN std_logic_vector ( 5 DOWNTO 0 );
5 l' t' U/ G2 i6 `9 S data_out : OUT std_logic_vector ( 5 DOWNTO 0 )
; |5 K! c8 E; W+ q8 E4 y/ a );
a+ e1 n7 ~' f9 V3 Gend component;
/ d o& s: W0 a. h/ i: B: l5 I( }- N' s
signal smem_out : std_logic_vector ( 5 downto 0 );
[9 S% @& r1 T& }7 V" ^signal scol_sel,srow_sel : std_logic_vector( 7 downto 0 );# l4 F- E9 D; l' h
BEGIN
- U, J9 G i9 H) @ u_0 : mem_coldec port map(mem_addr( 5 downto 3 ),scol_sel);: S" g t6 B/ ?/ y/ V0 @) O
u_1 : mem_rowdec port map(mem_addr( 2 downto 0 ),srow_sel);
" E9 i, l$ T0 |) x7 v# s g0 : for i in 0 to 7 generate -- column generate
. t! o: l; _, t) [" y g1 : for j in 0 to 7 generate -- row generate+ M# H6 G( i: J) \+ \* e a2 U* n
u_2 : latch_cell port map(clr_l,scol_sel(j),srow_sel(i),mem_in,smem_out);* L" | I. s5 x3 e3 ?
end generate;
; F4 j- q/ l( U/ K end generate;* Z. s* N) n1 ^; s. a
END ARCHITECTURE arch; |
|