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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:
8 Q) `+ ?; O; U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!$ ?5 p5 h4 z& b7 {5 I' e4 H& |
- q- B/ S3 Y: I L- wLIBRARY ieee;2 B, B; E; C8 s7 `# o3 J! G
USE ieee.std_logic_1164.all;
4 ?- \- L. o. N/ Y8 n8 IUSE ieee.std_logic_arith.all;) k# b5 [& o2 S* ^- ]4 W
1 e% |5 y( A' k! T3 v7 QENTITY memory_64 IS
& `* w) b) m \ PORT( " \ `# x2 l# F4 W* P% Y( a
mem_in : IN std_logic_vector ( 5 DOWNTO 0 );& C, [1 W4 h) O- s1 g2 D' |
mem_out : OUT std_logic_vector ( 5 DOWNTO 0 );! Z0 d2 Q0 o3 O2 O5 y
clr_l : IN std_logic;
1 T/ l$ c& G% w) A) O, q: K# ^ mem_addr : IN std_logic_vector ( 5 DOWNTO 0 )4 X3 E5 P/ C7 F4 I5 c
);
) }5 C( I- G- j8 J; L7 i/ d
- y: H" ~" Y8 r9 q4 J# s-- Declarations4 J0 A" ^4 f' f9 m8 m; o
+ e/ q$ T$ Z$ |, GEND memory_64 ;; l" Q. }# B4 ?6 \+ Z
9 J% i- `9 m" x& |8 I( [
--
7 |; }7 s8 ]* r( ^7 S7 TARCHITECTURE arch OF memory_64 IS
! S5 d3 q9 u# y" h' J0 v4 j-- column decoder
" v0 ~5 t) m2 ~component mem_coldec) W, D4 O4 |0 B5 K5 O) Q
PORT( : V- A/ o: H% e! N8 ^
col_addr : IN std_logic_vector ( 2 DOWNTO 0 );1 y- G) v6 V8 o# x* }' U
col_sel : OUT std_logic_vector ( 7 DOWNTO 0 )+ O. Q! W: @- ~
);/ b Z- h: s/ |. |
end component;! L2 s: c# c% d
-- row decoder2 ~; [# x- A6 N! O1 b
component mem_rowdec
6 `2 h& w: B3 M, z3 R# A PORT( " O- [( }+ e6 b, s E! p, T$ q
row_addr : IN std_logic_vector ( 2 DOWNTO 0 );
- i( O* {8 d( H+ a* x. L row_sel : OUT std_logic_vector ( 7 DOWNTO 0 )# E1 \& c$ J4 e
);2 Z" I) w4 K1 b. a6 F* G! z& x9 _
end component; $ l8 t% S% g% M6 W; o0 _
-- latch array
' x% R2 ]# Y$ S1 d3 b3 r9 l1 ^component latch_cell' x- h* `9 X+ E1 c, m) V
PORT( 7 J1 \6 D" c# |0 K2 n6 y0 p
clr_l : IN std_logic;
4 |7 f1 T- |3 D- F5 ^4 b$ O col_sel : IN std_logic;
# d: r5 w9 [8 H4 c" k row_sel : IN std_logic;
2 c! H& X/ W8 U6 d data_in : IN std_logic_vector ( 5 DOWNTO 0 );
+ C( w# A7 S6 b data_out : OUT std_logic_vector ( 5 DOWNTO 0 )4 N# w+ F3 u% \) S% z& K* L3 @
);
F% e# ~; Y2 D- E5 y* tend component; 8 Q7 `( | M1 U3 v
" Y1 f6 x9 _% ?! o, |signal smem_out : std_logic_vector ( 5 downto 0 );" X6 K e( ^. }
signal scol_sel,srow_sel : std_logic_vector( 7 downto 0 );
9 W2 X+ A' A( F6 j0 G. LBEGIN [* A* m, q* M) i$ R; S
u_0 : mem_coldec port map(mem_addr( 5 downto 3 ),scol_sel);
0 G2 w4 C6 f& T* g8 J) k* y u_1 : mem_rowdec port map(mem_addr( 2 downto 0 ),srow_sel);4 n3 ]0 i3 N. K
g0 : for i in 0 to 7 generate -- column generate" I* ~+ w+ D, D8 _$ x
g1 : for j in 0 to 7 generate -- row generate
; f. c! [. f+ F2 q1 J: P! |. A u_2 : latch_cell port map(clr_l,scol_sel(j),srow_sel(i),mem_in,smem_out);/ Z; h m* R) g8 d7 O( H& K
end generate;. W# W h% b3 G% A- E9 L" w
end generate;8 e4 \& @+ h5 ]' D
END ARCHITECTURE arch; |
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