Microchip Technology IC PIC MCU PIC16F1937-I/PT TQFP-44 MCP PIC16F1937-I/PT Data Sheet
Product codes
PIC16F1937-I/PT
2008-2011 Microchip Technology Inc.
DS41364E-page 275
PIC16(L)F1934/6/7
FIGURE 24-28:
I
2
C MASTER MODE WAVEFORM (RECEPTION, 7-BIT ADDRESS)
P
9
8
7
6
5
D0
D1
D2
D3
D4
D5
D6
D7
S
A7
A6
A5
A4
A3
A2
A1
SDA
SCL
12
3
4
5
6
7
8
9
12
3
4
5
67
8
9
12
3
4
B
u
s m
aster
ter
m
inate
s
tra
n
sfer
AC
K
Re
ce
ivin
g
Da
ta
fr
o
m
Sl
av
e
Re
ce
ivin
g Da
ta
fr
om
Sla
ve
D0
D1
D2
D3
D4
D5
D6
D7
ACK
R/
W
T
ra
n
smi
t A
ddr
ess to S
lave
SSPI
F
BF
AC
K
is
not
sent
W
ri
te t
o
S
S
P
C
ON
2<
0>
(S
E
N
=
1
),
W
ri
te
to S
S
P
B
U
F
occu
rs her
e,
A
C
K f
ro
m
Sl
a
ve
M
a
ster
confi
gured
as a r
e
cei
ver
by
pro
g
ram
m
ing
S
S
P
C
ON
2<
3>
(R
C
E
N
=
1
)
PE
N b
it =
1
w
ri
tte
n her
e
D
a
ta
sh
ifte
d i
n
on
fal
ling ed
ge of
C
L
K
C
lear
ed by so
ftw
are
st
ar
t X
M
IT
SEN =
0
SSPO
V
SDA
=
0
, S
C
L =
1
wh
ile
CPU
(S
S
PST
A
T
<0
>)
AC
K
Cle
a
re
d
b
y so
ftwa
re
C
lea
re
d b
y s
o
ftw
a
re
S
et S
S
P
IF
in
terr
upt
at en
d of r
e
cei
ve
Se
t P b
it
(SSP
ST
A
T
<4
>)
an
d S
S
P
IF
Cle
a
re
d
in
sof
twar
e
A
C
K
fro
m
Ma
ster
Se
t SS
PI
F a
t e
nd
S
e
t S
S
P
IF
inter
rup
t
at
end o
f A
cknow
ledge
se
quence
Se
t SS
PI
F in
te
rr
u
p
t
at e
nd of
A
ckno
w
-
ledge
seque
nce
of r
e
ceive
S
e
t A
C
K
E
N
, st
ar
t A
cknow
ledg
e sequ
ence
S
S
P
O
V
is
set
beca
use
S
SPB
UF
is still fu
ll
S
D
A = ACK
D
T =
1
RCEN cle
a
re
d
au
tom
a
tically
RCEN =
1
, st
ar
t
ne
xt r
e
ce
ive
W
rite to
S
S
P
C
ON2<
4>
to st
ar
t A
cknowledge
seque
n
ce
SD
A = ACK
D
T (
SSP
CO
N2
<5
>)
=
0
RCEN cle
a
re
d
au
tom
a
tically
re
sponds to
S
S
P
IF
ACKEN
be
gi
n S
tart
condi
tion
C
lear
ed by so
ftw
are
SDA = A
C
KDT
=
0
La
st bit is shif
ted
into S
S
P
S
R
and
con
tent
s ar
e unl
o
aded i
nto S
S
P
B
U
F
RCEN
Maste
r conf
ig
ured
as a r
e
cei
ver
by pr
ogra
mmi
ng
S
S
P
C
ON
2<
3>
(R
C
E
N
=
1
)
RCEN cle
a
re
d
au
toma
tically
ACK f
ro
m
M
a
st
e
r
SDA
=
ACKDT
=
0
RCE
N cle
a
re
d
auto
matica
lly