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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:
0 t) ]0 _- P: r+ J9 O# E+ R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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% h+ Z& ?/ e$ [- j9 j$ y/ B. o2 F p, RLIBRARY ieee;
8 H, r) U, j; M. N( H' JUSE ieee.std_logic_1164.all;. |: U- T: h6 j9 ^3 w
USE ieee.std_logic_arith.all;
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ENTITY memory_64 IS
! c" g- x' N r0 ?6 | PORT(
$ g* j. q8 H3 z+ { mem_in : IN std_logic_vector ( 5 DOWNTO 0 );
$ _# G* d; I4 B. W; n3 A! C mem_out : OUT std_logic_vector ( 5 DOWNTO 0 ); Q, t6 m; ]6 Y$ e& I6 U/ {" Y
clr_l : IN std_logic;0 U3 D3 U& U" N6 `* ]+ [: k0 ]
mem_addr : IN std_logic_vector ( 5 DOWNTO 0 ), Q$ T0 E0 p( x0 m. B
);
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-- Declarations) Q* ^) Q7 M' H0 X: Q* r
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END memory_64 ;+ s1 Y: f: A8 F& Z h' f! x
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ARCHITECTURE arch OF memory_64 IS- `' I3 o- F! B: F6 s P5 |& O2 f
-- column decoder; Z. g0 ]* D( B' j$ L. o1 c- t
component mem_coldec# d7 a( U) W7 g5 H: B$ z
PORT( : B2 F- l# d$ O/ t' x1 M- O6 n3 [
col_addr : IN std_logic_vector ( 2 DOWNTO 0 );+ k: B$ l, j$ A. F8 x6 w
col_sel : OUT std_logic_vector ( 7 DOWNTO 0 ). [9 s1 {2 o" _3 x9 W& [6 J
);8 @ M/ y/ U& i! ~+ J* V
end component;- q3 Y0 M0 B) a p6 d; H7 I1 ^
-- row decoder: ^8 A. C7 ^. {/ s
component mem_rowdec7 y* e9 X8 d! w4 S$ }/ x
PORT(
- q0 B6 |7 i" P7 m" x row_addr : IN std_logic_vector ( 2 DOWNTO 0 );
+ I( F" n8 J/ D6 j row_sel : OUT std_logic_vector ( 7 DOWNTO 0 )& Q( {5 S1 M: o% `) ?
);
3 V* C: U* l. U! Y. d3 I0 g# Bend component; $ }3 U" T; ]2 \6 q; ~/ j
-- latch array " F& j3 h9 D' \3 j" F9 b, N( |
component latch_cell
3 I) Z. q& T6 i: T/ N PORT( # ?2 m# g) @0 A8 T) }
clr_l : IN std_logic;
) o, @$ z2 K' A5 C( j, M col_sel : IN std_logic;
& ~6 L1 d" W; I6 G/ @ row_sel : IN std_logic; # S5 B0 f2 ~! I% D1 A* n _
data_in : IN std_logic_vector ( 5 DOWNTO 0 );5 }& @6 ~5 f0 w- F& z
data_out : OUT std_logic_vector ( 5 DOWNTO 0 )# O# E. R# b- F
);
8 U. W# T4 {2 k& f+ ]end component;
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signal smem_out : std_logic_vector ( 5 downto 0 );- Z5 U+ `& d" G1 Q2 e8 ]
signal scol_sel,srow_sel : std_logic_vector( 7 downto 0 );! @( t9 h3 S- K) P
BEGIN- h1 R0 U. C0 z5 K/ H
u_0 : mem_coldec port map(mem_addr( 5 downto 3 ),scol_sel);
; g! a6 v/ ?5 U& l4 S, ~ u_1 : mem_rowdec port map(mem_addr( 2 downto 0 ),srow_sel);6 g! H7 O' L7 K* Y
g0 : for i in 0 to 7 generate -- column generate
8 P4 N; t- c) g Z* U Y g1 : for j in 0 to 7 generate -- row generate8 Y" r% U2 Y8 i0 o/ I" |
u_2 : latch_cell port map(clr_l,scol_sel(j),srow_sel(i),mem_in,smem_out);
% F! q' { R. |. t' i ?. J end generate;
8 x) M7 C$ N; W end generate;
2 j9 L% Y& l0 q( y; k, c9 j' t7 XEND ARCHITECTURE arch; |
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