25.6.3 Serial Bus Interface (I2C/SIO)
25.6.3.1 I2C Mode
In the table below, the letter x represents the I2C/SIO operation clock cycle time which is identical to
the fsys cycle time. It varies depending on the programming of the clock gear function.It varies depend-
ing on the programming of the clock gear function.
n denotes the value of n programmed into the <SCK> (SCL output frequency select) field in the SBIxCR.
Parameter
Symbol
Equation
Standard Mode
Fast Mode
Unit
Min
Max
Min
Max
Min
Max
SCL Clock frequency
t
SCL
0
−
0
100
0
400
kHz
Hold time for START condition
t
HD; STA
−
−
4.0
−
0.6
−
μs
SCL clock low-width (Input) (Note 1)
t
LOW
−
−
4.7
−
1.3
−
μs
SCL clock high-width (Input) (Note 2)
t
HIGH
−
−
4.0
−
0.6
−
μs
Setup time for a repeated START condition
t
SU; STA
(Note 5)
−
4.7
−
0.6
−
μs
Data hold time (Input) (Note 3, 4)
t
HD; DAT
−
−
0.0
−
0.0
−
μs
Data setup time
t
SU; DAT
−
−
250
−
100
−
ns
Setup time for a STOP condition
t
SU; STO
−
−
4.0
−
0.6
−
μs
Bus free time between stop condition and
start condition
t
BUF
(Note 5)
−
4.7
−
1.3
−
μs
Note 1: SCL clock Low width (output): (2
n - 1
+ 58)/x
Note 2: SCL clock High width (output): (2
n - 1
+ 14)/x
On I2C-bus specification, maximum Speed of Standard Mode/fast mode is 100kHz/400khz. Internal SCL Frequency set-
ting should comply with fsys and Note1 & Note2 shown above.
Note 3: The output data hold time is equal to 4x of internal SCL.
Note 4: The Philips I2C-bus specification states that a device must internally provide a hold time of at least 300 ns for the
SDA signal to bridge the undefined region of the falling edge of SCL. However, this SBI does not satisfy this require-
ment. Also, the output buffer for SCL does not incorporate slope control of the falling edges; therefore, the equip-
ment manufacturer should design so that the input data hold time shown in the table is satisfied, including tr/tf of the
SCL and SDA lines.
Note 5: Software -dependent
Note 6: The Philips I2C-bus specification instructs that if the power supply to a Fast-mode device is switched off, the SDA
and SCL I/O pins must be floating so that they don't obstruct the bus lines. However, this SBI does not satisfy this re-
quirement.
SCL
t
SCL
t
LOW
t
HIGH
t
r
t
f
t
HD;DAT
t
SU;DAT
t
HD;STA
SDA
t
SU;STA
t
BUF
t
SU;STO
P
Sr
S
S: Start condition
Sr: Re-start condition
P: Stop condition
TMPM3V6/M3V4
25.
Electrical Characteristics
25.6 AC Electrical Characteristics
Page 504
2019-02-06
Содержание TMPM3V4
Страница 1: ...32 Bit RISC Microcontroller TX03 Series TMPM3V6 M3V4 ...
Страница 2: ... 2019 Toshiba Electronic Devices Storage Corporation ...
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Страница 148: ...TMPM3V6 M3V4 7 Exceptions 7 6 Exception Interrupt Related Registers Page 126 2019 02 06 ...
Страница 178: ...TMPM3V6 M3V4 9 Input Output port 9 2 Block Diagrams of Ports Page 156 2019 02 06 ...
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Страница 232: ...TMPM3V6 M3V4 11 Universal Asynchronous Receiver Transmitter Circuit UART 11 4 Operation Description Page 210 2019 02 06 ...
Страница 354: ...TMPM3V6 M3V4 14 Synchronous Serial Port SSP 14 6 Frame Format Page 332 2019 02 06 ...
Страница 419: ...TMPM3V6 M3V4 Page 397 2019 02 06 ...
Страница 420: ...TMPM3V6 M3V4 16 Analog Digital Converter ADC 16 6 Timing chart of AD conversion Page 398 2019 02 06 ...
Страница 462: ...TMPM3V6 M3V4 21 Watchdog Timer WDT 21 5 Control register Page 440 2019 02 06 ...
Страница 510: ...TMPM3V6 M3V4 22 Flash Memory Operation 22 4 Programming in the User Boot Mode Page 488 2019 02 06 ...
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