|
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: r, {, u0 r7 x) R+ k( S! R/ j
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!1 ?' j3 w: T% b9 W' A1 G
1 X8 {" F* ]5 F4 o( B0 @7 ^
LIBRARY ieee;
3 h: E* q3 \7 Z1 x/ sUSE ieee.std_logic_1164.all;% q+ D- j% w, U0 r! j
USE ieee.std_logic_arith.all;' U8 `' X6 z. ^
8 V x+ K& q4 V7 Z1 d4 LENTITY memory_64 IS8 W! s7 ~* j1 ]. ?3 i
PORT(
4 g/ y4 V# u' }2 o. j) t3 X2 E! L mem_in : IN std_logic_vector ( 5 DOWNTO 0 );
% ?% Q6 I" p% I+ W mem_out : OUT std_logic_vector ( 5 DOWNTO 0 );
- C- |, W ` C$ ?% M clr_l : IN std_logic;: z0 n; X7 j+ o$ x r
mem_addr : IN std_logic_vector ( 5 DOWNTO 0 )' u. m: d. u. t9 w
);7 W* _. a1 Q3 U- B# E6 k# }
& z2 i, a) q' o S-- Declarations
: Y$ A* a: Z$ p% _8 ~ n' |" b$ Z' U2 q% e. G
END memory_64 ;8 V) @' V: x( | B% y
% T+ N0 Y5 E; r( m--
5 Q8 Q4 c3 O9 _$ ~* k+ e3 N7 oARCHITECTURE arch OF memory_64 IS! |3 Y7 k; g7 v3 P
-- column decoder& a* \, V Y' T9 i; Y
component mem_coldec, S6 e# K3 w$ M+ H; W
PORT(
4 Z [5 @( v% W8 Q col_addr : IN std_logic_vector ( 2 DOWNTO 0 );
4 K* y, ~: D: J; U col_sel : OUT std_logic_vector ( 7 DOWNTO 0 )
& G2 {2 {4 t) ]/ U; ? );
7 f# I2 a+ U1 Y6 E: B7 |( Eend component;( c- s% X. c: k* E: ^4 }: R
-- row decoder
4 Q( ]/ H+ \+ i7 T& m/ E I3 scomponent mem_rowdec6 w3 z& M- ]0 D: y% D
PORT( % b+ `: k! U/ b- ^
row_addr : IN std_logic_vector ( 2 DOWNTO 0 );4 X. {& E% M; _0 i. h+ G) R0 z, ]
row_sel : OUT std_logic_vector ( 7 DOWNTO 0 )
; f, p* P) Q- G) m V4 o E6 { );
1 X, Y& d9 V7 z) B% Mend component; % G o) q$ Z" e8 K5 g1 V
-- latch array 9 g. j! e$ i, r1 R- v6 [. p3 Q
component latch_cell
: X0 e" C: `' E& u2 B2 w# r PORT(
1 W1 {1 b/ m* N3 }. N' X clr_l : IN std_logic;
1 D6 u2 t) o! c9 \' p$ e8 K0 E col_sel : IN std_logic;7 M. H! x6 Y5 ^9 }0 x2 ^$ i: C
row_sel : IN std_logic;
! \* I9 t- |# l2 p* w data_in : IN std_logic_vector ( 5 DOWNTO 0 );& d4 e/ Y; j6 k5 C( h% y2 I
data_out : OUT std_logic_vector ( 5 DOWNTO 0 )6 a' N; N3 X% j
);0 V) \; k; }" P+ g8 _. m! |) W
end component;
& T7 }% V+ Y" z' ? @5 z
1 Q- S0 z1 V% [0 }, V. esignal smem_out : std_logic_vector ( 5 downto 0 );9 {) c: Y" X+ o2 F8 r, W0 G
signal scol_sel,srow_sel : std_logic_vector( 7 downto 0 );0 [! [' U/ @. b- w! t& ~! P2 T
BEGIN
$ P; C+ \5 ?# p ? u_0 : mem_coldec port map(mem_addr( 5 downto 3 ),scol_sel);" d, H- |% U# X& {. p7 j$ g. W
u_1 : mem_rowdec port map(mem_addr( 2 downto 0 ),srow_sel);
; s* F$ G! C1 \& P5 J g0 : for i in 0 to 7 generate -- column generate6 P4 b7 w- j4 P7 X. \: `0 c
g1 : for j in 0 to 7 generate -- row generate7 |, M2 y! M5 t1 h3 A; a
u_2 : latch_cell port map(clr_l,scol_sel(j),srow_sel(i),mem_in,smem_out);
% @7 h$ z% a3 e$ W end generate;
- O% o) L, v6 ~ end generate;; ]& a( z0 n' A4 A# i0 s. l
END ARCHITECTURE arch; |
|