tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 299

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA001
18.6 AC Specifications
t
f
Table 18-6 AC Specifications (Circuit Output Timing)
SCL clock frequency
Hold time (re)start condition. This
period is followed by generation of the
first clock pulse.
Low-level period of SCL clock (output)
High-level period of SCL clock (output)
Low-level period of SCL clock (input)
High-level period of SCL clock (input)
Restart condition setup time
Data hold time
Data setup time
Rising time of SDA and SCL signals
Falling time of SDA and SCL signals
Stop condition setup time
Bus free time between the stop condi-
tion and the start condition
Time before rising of SCL after
SBICR2<PIN> is changed from "0" to
"1"
mode, refer to the following table.
The AC specifications are as listed below.
The operating mode (fast or standard) mode should be selected suitable for frequency of fcgck. For these operating
Note: For m and n, refer to"18.4.4.1 Clock source".
t
t
HD;STA
LOW
Parameter
t
r
t
HD;DAT
Figure 18-23 Definition of Timing (No. 1)
t
HIGH
t
Symbol
t
t
t
t
t
t
HD;STA
HD;DAT
SU;DAT
SU;STO
SU;SCL
SU;STA
t
t
t
t
SU;DAT
t
f
HIGH
HIGH
LOW
LOW
BUF
SCL
t
t
r
f
t
f
Depends on
the software
Depends on
the software
m / fcgck
m / fcgck
m / fcgck
n / fcgck
5 / fcgck
3 / fcgck
n / fcgck
MIN.
250
0
0
-
-
Standard mode
Page 285
fcgck / (m+n)
5 / fcgck
MAX.
1000
300
t
-
-
-
-
-
-
-
-
-
-
SU;STA
t
HD;STA
Depends on
the software
Depends on
the software
m / fcgck
m / fcgck
m / fcgck
n / fcgck
5 / fcgck
3 / fcgck
n / fcgck
MIN.
100
0
0
-
-
Fast mode
fcgck / (m+n)
5 / fcgck
MAX.
300
300
-
-
-
-
-
-
-
-
-
-
t
f
TMP89FM42
t
t
Unit
kHz
SU;STO
Ps
Ps
Ps
Ps
Ps
Ps
Ps
ns
ns
ns
Ps
Ps
Ps
BUF