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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:+ ~7 D7 e7 N$ a5 x" I) ?$ y
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!
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LIBRARY ieee;
* A( t$ H5 z6 W; sUSE ieee.std_logic_1164.all;
. Q! V0 }# l2 v' p: f f W- uUSE ieee.std_logic_arith.all;
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ENTITY memory_64 IS; h, E$ C9 X9 k, M
PORT(
' H! z( [- n- m( F* r mem_in : IN std_logic_vector ( 5 DOWNTO 0 );
& T& z" c" L7 X6 N y mem_out : OUT std_logic_vector ( 5 DOWNTO 0 );$ w( H- w2 N. O7 k* f2 p2 F
clr_l : IN std_logic;
* Y& {/ p- u. c+ G mem_addr : IN std_logic_vector ( 5 DOWNTO 0 )0 U, d2 l @; {: G x
); V6 b: F0 l' y% b
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-- Declarations
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END memory_64 ;
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--0 Q2 ~1 I! h# j- ?8 ^
ARCHITECTURE arch OF memory_64 IS
, p4 g Y0 |% a# l- j8 t4 @-- column decoder
( o! `1 m8 T8 e* \5 kcomponent mem_coldec
$ l4 d% q" W/ x& z PORT(
: [" O; K* Z: ] col_addr : IN std_logic_vector ( 2 DOWNTO 0 );
( E) Y9 P4 j8 B; b col_sel : OUT std_logic_vector ( 7 DOWNTO 0 )9 r$ g6 n: L+ }8 x; r' L
);
1 i L( o1 Q; n: f0 l0 P' [end component;
- \& W0 Y! m' ?! x( s; A. w-- row decoder
0 f+ ?) u0 Q) k' Zcomponent mem_rowdec0 i( O J( J$ n$ L% P
PORT( - q" g% x$ X, }9 X/ C
row_addr : IN std_logic_vector ( 2 DOWNTO 0 );
* E$ c- O! R3 o row_sel : OUT std_logic_vector ( 7 DOWNTO 0 )6 }; O5 A8 {9 z8 I6 Z
);
: }) p- E8 f6 D( Vend component;
$ U( ]7 C. E2 |-- latch array * w" w/ ~# q7 R2 J$ S
component latch_cell
8 v$ s& i) N, d; E1 h6 P PORT(
/ b1 z4 O7 U+ p$ G; _- A- d) R clr_l : IN std_logic;2 c6 t0 D0 l6 k2 }3 H
col_sel : IN std_logic;
% [2 |6 r" N# F0 `- ~ row_sel : IN std_logic; w. j$ j4 P' k& z& a& e) x
data_in : IN std_logic_vector ( 5 DOWNTO 0 );' _& `$ Y3 i2 I! ?! Z* U
data_out : OUT std_logic_vector ( 5 DOWNTO 0 )% j( ?0 ] y# D2 i6 x f+ o$ \
);, e1 p+ c+ J; j
end component;
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signal smem_out : std_logic_vector ( 5 downto 0 );
3 ]3 N' f/ }' }# @3 Ysignal scol_sel,srow_sel : std_logic_vector( 7 downto 0 );8 V3 J5 K4 R' q3 [) m
BEGIN
4 v5 c0 i% f. B4 n1 t u_0 : mem_coldec port map(mem_addr( 5 downto 3 ),scol_sel);
C0 p# G1 ^: N" ]" s* u% Z u_1 : mem_rowdec port map(mem_addr( 2 downto 0 ),srow_sel);3 n# \! j& d- k; @. ]; X0 E
g0 : for i in 0 to 7 generate -- column generate
5 t8 ?( W; S# i; A" B+ } g1 : for j in 0 to 7 generate -- row generate+ K! `, m7 b! {3 E# e
u_2 : latch_cell port map(clr_l,scol_sel(j),srow_sel(i),mem_in,smem_out);2 t7 B! e1 Y6 z' z0 X
end generate;( R3 U8 ~: D2 B
end generate;
, ?0 \, w2 z3 d8 \3 m. DEND ARCHITECTURE arch; |
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