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bv ￥ üt
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y ?
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V ( V?èyT bèa￥S?1 10 V è
@y ?
H W 1
0 s CMOSy\??{ 20 mW b
DAC0832D ?
1 20??
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T
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DAC
0832
1
2
3
4
5
6
7
8
9
10
CS VCC
ILE
WR2
XFER
DI4
DI5
DI6
DI7
Iout2
Iout1
WR1
AGND
DI3
DI2
DI1
DI0
Vref
Rfb
DGND 11
12
13
14
15
16
17
18
19
20
mm 16.1 DAC0832??m??m
DI0
DI7
8ê
7i
DAC
8ê
D/A
D
8ê
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&
&
&
ILE
CS
WR1
WR2
XFER
LE1 LE2
Iout1
Iout2
Vref
Rfb
AGND
DGND
VCC
…
m
m
16.2 DAC0832
=?2 m
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êè
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è
^?
è
^ ￥?
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b
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LC 8ê
￥
D bò???|
a
ü
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(1)DI7 jDI0 D
{ ? b
(2)
ê?|
{ ??è
üμr b
(3) ILE
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(4) ? 1?|
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üμr b
1
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CS
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^
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T
^
í
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H1
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ILE=1 =1
H1
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(5) ? 2?|
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.
e??|
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T
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T
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H1 DAC7i
íiZ
T b
1WR
1WR
2WR
XFER
2WR
XFER
2WR XFER
(7)?Iout1 è
@
{ 1 b
(8)?Iout2 è
@
{ 2 b
DACD ￥+?-B
^ Iout1+Iout2=è
b
(9)?Rfb Q ?èE
b
DAC 0832
^è
@
{1
|¤èa
{3 èa
{
¤
bv Rfb'1
bv ￥Q ?èE
b
bv ￥¤E ?m 16.3
U b
(10) Vref èa èa V? VμS?
^ -10 V j
+10 V b
(11)?DGND
31 b
(12)?AGND
E1 b
Iout2
Iout1
Rfb
è
ü
{
mm 16.3
bv ¤E
bv ¤E
16.3 ?
Z
T￥¤ gD?¨
1,?
Z
T ?¤
ì?
Z
Tü
^
P DAC 0832￥
?
{ ?7i ?μB
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s e￥
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a
?
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H
s e￥Z
T b
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^
E
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^
E
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{
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Z
T b
?
Z
T￥
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U b
74LS373
G
DI7~DI0
VCC
ILE
Vref
Rfb
A
CS
XFER
WR1
WR2
P0
ALE
P2.7
WR
8051
DAC0832
5 V
Vout
Iout1
Iout2
AGND
DGND
mm 16.4 DAC 0832?
Z
T¤ g?
Z
T¤ g
CS
DI0
DI1
DI2
DI3
DI4
DI5
DI6
DI7
P0.7~P0.0
WR1
WR2
VCCILE
Vref
XFER
10 k? 10 k?
10 k?
10 V
10 V
Rfb
Iout1
Iout2
DAC0832
5 V
WR
1?r
{
mm 16.5 ¨ DACá
3 oá
3 o
m 16.5?,DAC7i )?°YZ
T b
2,?
Z
T?¨ è ——á
3 o
? e ??¨?1 pμB?L?9é￥èa
?
e? _?V? M ?,
c3 M ?è0
? bN VYV
DAC0832￥
{
¤
bv ?
bv á
3 o ?
LCè
^ ?¤ ?m 16.5
U bm?￥ DAC8032yT??
Z
T ?
{ ?7i
s e7 DAC7i °Y b
ORG 0000H
MAIN,MOV DPTR,#0A000H
MOV A,#0FFH
MOVX @DPTR,A ?
ACALL DELAY
MOV DPTR,#0A000H
MOV A,#80H T?
T?
MOVX @DPTR,A
ACALL DELAY
MOV DPTR,#0A000H
MOV A,#40H Q
MOVX @DPTR,A
ACALL DELAY
MOV DPTR,#0A000H
MOV A,#00H QF
QF
MOVX @DPTR,A
ACALL DELAY
SJMP $
END
L?
{ ?7i 1?1 7FFFHá
3 o￥÷?? b?
?/
ORG 0200H
DASAW MOV DPTR #7FFFH
{ ?7i 1?
L? P2.7¤
MOV A #00H D′
WW,MOVX @DPTR A D/AD
INC A
NOP ü
H
NOP
NOP
AJMP WW
3?
??
bv ￥
{
ü
¤? ?m 16.6
U￥ o b
o￥á
3T ?/+?
a
ü
(1) ??
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L=
o￥
6H
^? 256?l¨0?￥???¨0l
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A ü
^ ?m 16.6?
V
U￥L?9é o b
(2) VYV?ì??
￥ ?
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9
o￥?
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H￥÷E ??Mo??
ù b?üt
HW?
H V¨ NOP·
7 ?
LC
'??ü
^ ?N ?3
1üt
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H V[
P¨B?ü
H0?? bü t
H W ?
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ù?] o￥|
qü?] b
mm 16.6 D/ADá
3￥ oDá
3￥ o
(3) YV AF 1 V¤??_￥ o ?1¤?μ_￥
o?1h 1·
7' V
LC b
(4) ??? A￥MS?
^ 0 j255yN¤?￥ o
^
?￥ b ?1 p¤?d
? o VYV9
p¤
3
￥
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Tü
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íi ?¤?
s e
íiZ
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DAC0832￥ ?¤ ?m 16.7
U b
1
LC7i ￥ V e??ó7i s
￥B?1?
[ L
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{sY¤
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LC ?a ó4êY?|?"ü??
?
í
i ? V e￥
¤ gZ
T b
í
i
r
WR
P0.7~P0.0
8031
ALE
EA
WR1
WR2
XFER
CS
ILE
DI7~DI0
DAC0832
5 V
mm 16.7 DAC 0832￥
Z
T ?¤￥
Z
T ?¤
2,
Z
T?¨ è
Z
T¨?
^ D/AD"d[
LC
^
E?|]
?
{￥
"￥ b è ?
P¨?
e? X-YmN b X-YmN?
X aY
?Z_￥?éè z? ?B?è e?m3 X
Z_?
6B?è e?m3 YZ_?V7m? b
yN X-YmN￥ e?μ
?'1 p B
^31
^ D/A
D sYó XY? YY?4
E?|=
^
^
E
1
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{ b
^
E
{
^1
Pm3
X-YàT
ü
?7
E
]?
{5
^1
P?￥ wL;á ?5? ￥ w
Lü
^
¨￥￥ wL ?m 16.8
U b1Nü1
P¨
DAC0832i?¨
Z
T ?¤ ?m 16.9
U b
m 16.9è
^?[r
Eá
31?
DAC0832
] ?
??í1? ?
?
{ ?7i ò]B?1?7
? DAC
7i 5¨B?1? b
I?
H5¨BH.
·
7ü XUS
? X_D ￥
{
?7 i ¨BH.
·
7ü YUS
? Y_D ￥
{
?7i Ka ¨BH.
·
7]
Hu 7
?D ￥ DAC
7i é?
D' V
LC X aY
?Z_US
￥]?
{ b
(a) b) (c)
mm 16.8 ?
e??
e? X-YmNmN
(a) ]?
{ ]?
{ (b) 5 Xaa Y (c) 5 Yaa X
í
i
r
CS
XFER
DI7~DI0
WR1
WR2
Rfb
Iout1
Iout2
CS
XFER
DI7~DI0
Rfb
Iout1
Iout2
0832
0832
P0.7~P0.0
WR
0831
V
x
V
y
mm 16.9 e? e? X-YmN￥
mN￥
DAC 0832 ¤ g¤ g
L? XZ_ DAC 0832
{ ?7i 1?1 F0H YZ_ DAC
0832
{ ?7i 1?1 F1H
? DAC7i ¨1?1
F2H XUS
i? DATA?í? YUS
i? DATA+1
?í?5mN￥ z???1
MOV R1 #DATA XUS
?í1?
MOV R0 #0F0H X_
{ ?7i 1?
MOV A @R1 XUS
A
2
2
MOVX @R0 A XUS
{ ?7i
INC R1 ·_ YUS
?í1?
INC R0 ·_ Y_
{ ?7i 1?
MOV A @R1 YUS
A
MOVX @R0 A YUS
{ ?7i
INC R0 ·_
? DAC7i 1?
MOVX @R0 A X aYD
]?
{
L
? TLC5615μl?
μl?
DIP
DIP
￥
TLC5615?
??
?m
?
??
?m
1
U b
? ???
a
ü ?/ ???
a
ü ?/
? ——?? 1DIN 1?
{ ?
1?
{ ?
? ——?? 2SCLK 1?
Hò
{ ?
1?
Hò
{ ?
? ——?? 3CS ?
ê¨Y
?è
üμr
? ——?? 4DOUT ¨?) ó
H￥1?
{
¨?) ó
H￥1?
{
? ——?? 5AGND
E1
? ——?? 6REFIN èa
{ ?
èa
{ ?
? ——?? 7OUT DAC
Eèa
{
Eèa
{
? ——?? 8VDD ?è÷
b
TLC5615￥
H?m
￥
H?m
L
% "
Lá
3 o ?¨?
5 - $
//p3.2---DIN
//p3.7--SCLK
//p3.6--CS
org 0000h
mov r1,#0h
tlc5615:
clr p3.7
clr p3.2
setb p3.6 ;
S cs1úè
ü
nop
nop
inc r1
mov r0,#0h
clr p3.6
mov a,r1
mov r3,#08h ;high 8 bit
lcall cuso
mov a,r0
mov r3,#04h
lcall cuso ;low 4 bit
setb p3.6
sjmp TLC5615
ret
cuso:
nop
loop,
rlc a
mov p3.2,c
nop
setb p3.7
nop
clr p3.7
djnz r3,loop
ret
end
T |?
!y?
3 ?
T |?
!y?
3 ?
T
3 ?
T
C?y#
?y#
?
"d 7?
?
"d 7?
?q
!9 I
n￥ù5
?q
!9 I
n￥ù5
? ê4sO
q
ê4sO
q
3~8ê
ê
/9~12ê
ê
/13ê[
? ??ú
μS?
??ú
μS?
? A/DD
HW
^
D
HW
^
?
{ ?
{ ?
/
{+?S?
{+?S?
? è÷? ??{
è÷? ??{
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yTìa
? ¤ g
^?ZL
¤ g
^?ZL
?
?
16?
?
D/AD ¤ g
D ¤ g
16.1 D/AD à
D/AD
{ ?￥
^
3
üDa
{￥
^
E
b
μ1 D/AD ￥/
?
·S è ? 'ú aMú
aL? a
{èaS? a?"
a
{ ?
3 }
? ?
=é?BCD
? b
1) sP
q
sO
q
^ D/AD
{ ?
M
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D
{
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3
￥ê
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3
￥ê
1 n5 D/AD
￥sO
q1 2
-n
b?üi?"
/
D
Y￥ 2
-n
{ ?
TQ? b
è ? 8ê
￥sO
q1 1/256 10ê
￥sO
q1 1/1024? b
yN
3
ê
sO
q9ü ú g 'D
{ ?
M￥
ù??9ü ú b
P¨
H? ? sO
q￥ 31 ?
ê?D ￥ê
b DACè Vs1 8ê a 10ê a 12ê ?? b
2) y ?
HW
y ?
HW
^
í
D/AD
y
¤￥B??
·V
{ ?
3
M?
{r??′μ
1/2 LSB
K?μrê
H
3
￥
HW bYè[y ?
HW ?V
UD
,
D ￥
{?
T1è
@
Hy ?
HW?
{?
T1
èa
H??y ?
HW1F
bv ￥ üt
HW y N
y ?
HW1éB? b?9￥ ?
a D/AD
ùú? A/DD
y
￥ D/AD ￥y ?
HW Vr 1 0 s b
3) ¤ g?
T
D/AD D?
¤ gZLD??1 %? ?D '
&
^?{
íi bμ
? D/AD B ?
^?{
íi
￥
6B ?
^{
íi ￥ b??{
íi ￥ D/AD 1
i ?1?
￥D
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H1
6 F
í i y N? ?
D A? gL
7{
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AT
^B?
{ gyN V°¤
9L
7?3
6F
íi b
16.2 ?? D/AD ?
DAC0832
DAC0832
^B? 8ê D/AD b?è÷èV +5 V j+15
V ( V?èyT bèa￥S?1 10 V è
@y ?
H W 1
0 s CMOSy\??{ 20 mW b
DAC0832D ?
1 20??
°?
T
??
m ?m 16.1
U b DAC0832
=?2 m ?m 16.2
U b ?
D ?
{ ?7i DAC7i ?
)
{ ?
íi b
P¨
H
{ ? V[?¨
)
íi
íi?
T?)
íi
B)
íiB)°Y?
T°¤
{ ?
)°Y?
T b
DAC
0832
1
2
3
4
5
6
7
8
9
10
CS VCC
ILE
WR2
XFER
DI4
DI5
DI6
DI7
Iout2
Iout1
WR1
AGND
DI3
DI2
DI1
DI0
Vref
Rfb
DGND 11
12
13
14
15
16
17
18
19
20
mm 16.1 DAC0832??m??m
DI0
DI7
8ê
7i
DAC
8ê
D/A
D
8ê
{ ?
7i
&
&
&
ILE
CS
WR1
WR2
XFER
LE1 LE2
Iout1
Iout2
Vref
Rfb
AGND
DGND
VCC
…
m
m
16.2 DAC0832
=?2 m
N? ? ??D
êè
^F?7i
{ e?
è
^?
è
^ ￥?
^ é?
íi e?? =0
H
{ ?
$
í
i ? =1
H
íi ￥
{?
{ ?￥
b
D/ADè
^
^B? R-2R T?èE?
LC 8ê
￥
D bò???|
a
ü
?/
(1)DI7 jDI0 D
{ ? b
(2)
ê?|
{ ??è
üμr b
(3) ILE
íi
??|
{ ?úè
üμr b
(4) ? 1?|
{ ??è
üμr b
1
WR
CS
??| e?
{ ?7i
^
°YZ
T
^
í
iZ
T? ILE=1 =0
H1
{ ?7i °YZ
T ?
ILE=1 =1
H1
{ ?7i
íiZ
T b
(5) ? 2?|
{ ??è
üμr b
(6)
.
e??|
{ ??è
üμr b
??| e? DAC7i
^
°YZ
T
^
í
iZ
T? =0 =0
H1 DAC7i °YZ
T
? =1 =0
H1 DAC7i
íiZ
T b
1WR
1WR
2WR
XFER
2WR
XFER
2WR XFER
(7)?Iout1 è
@
{ 1 b
(8)?Iout2 è
@
{ 2 b
DACD ￥+?-B
^ Iout1+Iout2=è
b
(9)?Rfb Q ?èE
b
DAC 0832
^è
@
{1
|¤èa
{3 èa
{
¤
bv Rfb'1
bv ￥Q ?èE
b
bv ￥¤E ?m 16.3
U b
(10) Vref èa èa V? VμS?
^ -10 V j
+10 V b
(11)?DGND
31 b
(12)?AGND
E1 b
Iout2
Iout1
Rfb
è
ü
{
mm 16.3
bv ¤E
bv ¤E
16.3 ?
Z
T￥¤ gD?¨
1,?
Z
T ?¤
ì?
Z
Tü
^
P DAC 0832￥
?
{ ?7i ?μB
?)?°YZ
T7
6B?)?
s e￥
íiZ
T?
a
?
{ ?7i ]
H
s e￥Z
T b
L=?¨? ?ToμB
^
E
{
ùμ+
^
E
? i?1 p]?
{
Hü V ?
¨?
Z
T b
?
Z
T￥
? ?¤ ?m 16.4m 16.5
U b
74LS373
G
DI7~DI0
VCC
ILE
Vref
Rfb
A
CS
XFER
WR1
WR2
P0
ALE
P2.7
WR
8051
DAC0832
5 V
Vout
Iout1
Iout2
AGND
DGND
mm 16.4 DAC 0832?
Z
T¤ g?
Z
T¤ g
CS
DI0
DI1
DI2
DI3
DI4
DI5
DI6
DI7
P0.7~P0.0
WR1
WR2
VCCILE
Vref
XFER
10 k? 10 k?
10 k?
10 V
10 V
Rfb
Iout1
Iout2
DAC0832
5 V
WR
1?r
{
mm 16.5 ¨ DACá
3 oá
3 o
m 16.5?,DAC7i )?°YZ
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T?¨ è ——á
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DAC0832￥
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¤
bv ?
bv á
3 o ?
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^ ?¤ ?m 16.5
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Z
T ?
{ ?7i
s e7 DAC7i °Y b
ORG 0000H
MAIN,MOV DPTR,#0A000H
MOV A,#0FFH
MOVX @DPTR,A ?
ACALL DELAY
MOV DPTR,#0A000H
MOV A,#80H T?
T?
MOVX @DPTR,A
ACALL DELAY
MOV DPTR,#0A000H
MOV A,#40H Q
MOVX @DPTR,A
ACALL DELAY
MOV DPTR,#0A000H
MOV A,#00H QF
QF
MOVX @DPTR,A
ACALL DELAY
SJMP $
END
L?
{ ?7i 1?1 7FFFHá
3 o￥÷?? b?
?/
ORG 0200H
DASAW MOV DPTR #7FFFH
{ ?7i 1?
L? P2.7¤
MOV A #00H D′
WW,MOVX @DPTR A D/AD
INC A
NOP ü
H
NOP
NOP
AJMP WW
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8031
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ILE
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DAC0832
5 V
mm 16.7 DAC 0832￥
Z
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7i 5¨B?1? b
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·
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·
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7]
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7i é?
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LC X aY
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(a) b) (c)
mm 16.8 ?
e??
e? X-YmNmN
(a) ]?
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í
i
r
CS
XFER
DI7~DI0
WR1
WR2
Rfb
Iout1
Iout2
CS
XFER
DI7~DI0
Rfb
Iout1
Iout2
0832
0832
P0.7~P0.0
WR
0831
V
x
V
y
mm 16.9 e? e? X-YmN￥
mN￥
DAC 0832 ¤ g¤ g
L? XZ_ DAC 0832
{ ?7i 1?1 F0H YZ_ DAC
0832
{ ?7i 1?1 F1H
? DAC7i ¨1?1
F2H XUS
i? DATA?í? YUS
i? DATA+1
?í?5mN￥ z???1
MOV R1 #DATA XUS
?í1?
MOV R0 #0F0H X_
{ ?7i 1?
MOV A @R1 XUS
A
2
2
MOVX @R0 A XUS
{ ?7i
INC R1 ·_ YUS
?í1?
INC R0 ·_ Y_
{ ?7i 1?
MOV A @R1 YUS
A
MOVX @R0 A YUS
{ ?7i
INC R0 ·_
? DAC7i 1?
MOVX @R0 A X aYD
]?
{
L
? TLC5615μl?
μl?
DIP
DIP
￥
TLC5615?
??
?m
?
??
?m
1
U b
? ???
a
ü ?/ ???
a
ü ?/
? ——?? 1DIN 1?
{ ?
1?
{ ?
? ——?? 2SCLK 1?
Hò
{ ?
1?
Hò
{ ?
? ——?? 3CS ?
ê¨Y
?è
üμr
? ——?? 4DOUT ¨?) ó
H￥1?
{
¨?) ó
H￥1?
{
? ——?? 5AGND
E1
? ——?? 6REFIN èa
{ ?
èa
{ ?
? ——?? 7OUT DAC
Eèa
{
Eèa
{
? ——?? 8VDD ?è÷
b
TLC5615￥
H?m
￥
H?m
L
% "
Lá
3 o ?¨?
5 - $
//p3.2---DIN
//p3.7--SCLK
//p3.6--CS
org 0000h
mov r1,#0h
tlc5615:
clr p3.7
clr p3.2
setb p3.6 ;
S cs1úè
ü
nop
nop
inc r1
mov r0,#0h
clr p3.6
mov a,r1
mov r3,#08h ;high 8 bit
lcall cuso
mov a,r0
mov r3,#04h
lcall cuso ;low 4 bit
setb p3.6
sjmp TLC5615
ret
cuso:
nop
loop,
rlc a
mov p3.2,c
nop
setb p3.7
nop
clr p3.7
djnz r3,loop
ret
end
