RX8111CE
Page
−
10
ETM61E-01
9.2.
AC Characteristics
9.2.1. AC Characteristics 1
Table 7 AC Characteristics
Unless otherwise specified,
､
GND = 0V,V
IO
= 1.6 V to 5.5 V, Ta = -40
C to +85
C
Item
Symbol
SCL = 100
kHz
(
Standard-Mode
)
SCL = 400
kHz
(
Fast-Mode
)
Unit
Min.
Max.
Min.
Max.
SCL clock frequency
fSCL
100
400
kHz
Start condition setup time
tSU;STA
4.7
0.6
s
Start condition hold time
tHD;STA
4.0
0.6
s
Data setup time
tSU;DAT
250
100
ns
Data hold time
tHD;DAT
0
0
ns
Stop condition setup time
tSU;STO
4.0
0.6
s
Bus idle time between
start condition and stop condition
tBUF
4.7
1.3
s
Time when SCL =
"L"
tLOW
4.7
1.3
s
Time when SCL = "H"
tHIGH
4.0
0.6
s
Rise time for SCL and SDA
tr
1.0
0.3
s
Fall time for SCL and SDA
tf
0.3
0.3
s
Allowable spike time on bus
tSP
50
50
ns
Timing Chart
t
HD ; DAT
t
SU ; DAT
t
HD ; STA
t
LOW
t
HIGH
1 / f
SCL
t
r
t
f
t
SU ; STA
SDA
SCL
START
CONDITION
(S)
BIT 7
MSB
(A7)
BIT 6
(A6)
ACK
(A)
Protocol
t
BUF
t
SU ; STO
STOP
CONDITION
(P)
START
CONDITION
(S)
(P)
(A)
t
HD ; STA
t
SU ; STA
(S)
BIT 0
LSB
(R/W)
(S)
t
SP
Figure 13 I
2
C Timing Chart
I
2
C interface is reset 2 seconds after slave address is received.
To restart serial communication, send START Condition again.
8bit data is latched at rising edge of SCL of ACK.
If communication is cancelled halfway of sending the 8bit, data is not written.
9.2.2. AC Characteristics 2
Table 8 FOUT duty
Unless otherwise specified, GND = 0 V, V
IO
= 1.6 V
5.5 V, Ta =
−
40
C
+85
C
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
FOUT duty
Tw / t
Vth = 50% V
IO
40
60
%
