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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:2 C, {' Q7 x0 ?8 b
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!, |* N0 j7 j4 s' W1 l4 U% @$ |& d
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LIBRARY ieee;7 v \" N& u( H& r o# @: c& a
USE ieee.std_logic_1164.all;! V% L6 Q# ^0 T& q7 E; ?
USE ieee.std_logic_arith.all;2 A. Y+ q* _0 k3 g/ I
t7 C) e$ {/ e) y* Y& C; RENTITY memory_64 IS
- r3 J7 J \$ V$ p PORT(
/ o/ t# c1 l5 E5 e) b8 z" E8 Z mem_in : IN std_logic_vector ( 5 DOWNTO 0 );
& ?; |& _2 f( y8 R# K mem_out : OUT std_logic_vector ( 5 DOWNTO 0 );: ?6 G* d: k5 L6 `( d! k9 o O: s
clr_l : IN std_logic;. i' c. w' Q/ T s& N; s9 y
mem_addr : IN std_logic_vector ( 5 DOWNTO 0 )0 @7 ^3 D( \: t( h
);" F; c" f' U8 k4 e
& N/ y$ @( f% C* }* Y# J& ?1 G-- Declarations1 r: O+ H8 a3 _, g! @$ I4 s
) |( P6 P$ L( H% p7 }END memory_64 ;6 m6 c5 X2 v- R$ ~
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--2 L: s+ `: |& n' r
ARCHITECTURE arch OF memory_64 IS
: l# ?3 E: W2 K( r" {- q) }-- column decoder2 f( H: _9 u9 \6 f& u) `9 O$ T
component mem_coldec
, K( B4 y+ S8 K9 [; b% P* M* j PORT( ' V, D" ?4 B' u
col_addr : IN std_logic_vector ( 2 DOWNTO 0 );
0 _) `7 K6 T/ J0 ~4 k) g col_sel : OUT std_logic_vector ( 7 DOWNTO 0 )
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end component;; C' g% Z* z5 Z, W1 N- O
-- row decoder
- l. y) E6 E( c2 ]1 N: B( w" ?6 `component mem_rowdec
H1 q" o0 t+ v) Y) O3 v$ j( r PORT(
, E8 `# n, O8 J& | row_addr : IN std_logic_vector ( 2 DOWNTO 0 );
/ x! e6 `. w5 ~: Q row_sel : OUT std_logic_vector ( 7 DOWNTO 0 )
5 I/ ~. Z8 z0 B' l/ R0 L5 ?7 D );
/ Y' [1 I5 M% u' K' E$ i% e1 L+ rend component; / y$ w. S0 e' {' O( ` T
-- latch array
6 _# d, o; m, Ycomponent latch_cell
9 x5 U* z6 r- [9 u6 N PORT(
6 j# }9 m" L+ E" w/ f( T( ^ clr_l : IN std_logic;
Y& r! S$ ^" H1 j col_sel : IN std_logic;( Y! Y. r( C) C5 c+ F
row_sel : IN std_logic;
( m! R) x4 P' U7 E' |& Y data_in : IN std_logic_vector ( 5 DOWNTO 0 );# L8 k0 ]2 E0 J7 X1 Z
data_out : OUT std_logic_vector ( 5 DOWNTO 0 )! U( Z. L9 N7 `- k3 P T0 l
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end component; ; Z1 l+ d4 t; d% A" V+ U
7 E6 W! V" c! K" J5 S! Y. r; Esignal smem_out : std_logic_vector ( 5 downto 0 );8 s( ?0 ~ P7 E* w1 S2 o( x
signal scol_sel,srow_sel : std_logic_vector( 7 downto 0 );9 E6 f! o- c' x6 a* f4 P" C
BEGIN6 f* d% e) U! w8 }% N( W% ]# R. P
u_0 : mem_coldec port map(mem_addr( 5 downto 3 ),scol_sel);
. t0 K* v9 t$ I2 w u_1 : mem_rowdec port map(mem_addr( 2 downto 0 ),srow_sel); a" x! U, g; [1 j
g0 : for i in 0 to 7 generate -- column generate* J+ D; {) i4 l* l
g1 : for j in 0 to 7 generate -- row generate
$ M0 a3 ~$ R) a2 T u_2 : latch_cell port map(clr_l,scol_sel(j),srow_sel(i),mem_in,smem_out);
! b8 o5 ~/ P( J$ i. p end generate;9 y# _: r+ N7 ?( p
end generate;
8 w# d1 |. L+ x- oEND ARCHITECTURE arch; |
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