參數(shù)資料
型號(hào): PCA9539BS,115
廠商: NXP Semiconductors
文件頁數(shù): 4/37頁
文件大?。?/td> 0K
描述: IC I/O EXPANDER I2C/SMBU 24HVQFN
標(biāo)準(zhǔn)包裝: 1,500
系列: *
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PCA
953
9_PC
A
953
9R
Al
li
n
for
m
at
ion
pr
ovi
ded
in
this
do
cum
ent
i
s
sub
jec
tto
leg
a
ld
is
c
la
im
er
s.
NXP
B.V
.
2013.
Al
lr
ig
h
ts
re
s
e
rv
ed.
Produ
ct
d
at
a
sheet
Rev
.6
6
Feb
ruary
2013
12
o
f37
N
X
P
Semi
conductor
s
PCA9539;
PCA9539R
16-
bit
I
2C-b
us
an
d
SM
Bu
s
lo
w
powe
rI/O
po
rt
wit
h
int
e
rr
upt
a
nd
re
set
Remark: Transfer of data can be stopped at any moment by a STOP condition. When this occurs, data present at the latest acknowledge phase is valid (output mode). It
is assumed that the command byte has previously been set to ‘00’ (read input port register).
Fig 10. Read input port register, scenario 1
1101
A1 A0
1
A
S1
START condition
R/W
acknowledge
from slave
002aad728
A
SCL
SDA
A
read from port 0
P
9
8
7
6
5
4
3
2
1
I0.x
slave address
STOP condition
acknowledge
from master
A
I1.x
acknowledge
from master
A
I0.x
acknowledge
from master
1
I1.x
non acknowledge
from master
data into port 0
read from port 1
data into port 1
INT
6543210
7
6543210
7
6543210
7
6543210
7
INT
tv(INT_N)
trst(INT_N)
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