H8SSLASH2224 datasheet(765/1071 Pages) RENESAS

765 / 1071 page

Section 16 I

2C Bus Interface (IIC) (Option)

Rev. 5.00 Aug 08, 2006 page 679 of 982

REJ09B0054-0500

Table 16.9 I2C Bus Timing (with Maximum Influence of tSr/tSf)

Time Indication (at Maximum Transfer Rate) [ns]

Item

tcyc Indication

tSr/tSf

Influence

(Max)

2C Bus

Specifi-

ation

(Min)

φφφφ =

5 MHz*

φφφφ =

8 MHz*

φφφφ =

10 MHz

φφφφ =

16 MHz*

φφφφ =

20 MHz*

tSCLHO

0.5tSCLO (–tSr)

Standard mode

–1000

4000

High-speed mode –300

600

950

tSCLLO

0.5tSCLO (–tSf )

Standard mode

–250

4700

4750

High-speed mode –250

1300

1000*

tBUFO

Standard mode

–1000

4700

3800*

3875*

3900*

3938*

3950*

0.5tSCLO –1tcyc

( –tSr )

High-speed mode –300

1300

750*

825*

850*

888*

900*

tSTAHO

Standard mode

–250

4000

4550

4625

4650

4688

4700

0.5tSCLO –1tcyc

(–tSf )

High-speed mode –250

600

800

875

900

938

950

tSTASO

1tSCLO (–tSr )

Standard mode

–1000

4700

9000

High-speed mode –300

600

2200

tSTOSO

Standard mode

–1000

4000

4400

4250

4200

4125

4100

0.5tSCLO + 2tcyc

(–tSr )

High-speed mode –300

600

1350

1200

1150

1075

1050

Standard mode

–1000

250

3100

3325

3400

3513

3550

tSDASO

(master)

1tSCLLO*

2 –3tcyc

(–tSr )

High-speed mode –300

100

400

625

700

813

850

Standard mode

–1000

250

3100

3325

3400

3513

3550

tSDASO

(slave)*

1tSCLL*

2 –3tcyc

(–tSr )

High-speed mode –300

100

400

625

700

813

850

Standard mode

–1000

250

—

2500

—

tSDASO

(slave)*

1tSCLL*

2 –12tcyc*6

(–tSr )

High-speed mode –300

100

—

–200*

——

tSDAHO

3tcyc

Standard mode

600

375

300

188

150

High-speed mode 0

600

375

300

188

150

Notes: 1. Does not meet the I

2C bus interface specification. Remedial action such as the following

is necessary: (a) secure a start/stop condition issuance interval; (b)adjust the rise and

fall times by means of a pull-up resistor and capacitive load; (c) reduce the transfer rate;

(d) select slave devices whose input timing permits this output timing.

The values in the above table will vary depending on the settings of the IICX bit and bits

CKS0 to CKS2.Depending on the frequency it may not be possible to achieve the

maximum transfer rate; therefore, whether or not the I

2C bus interface specifications are

met must be determined in accordance with the actual setting conditions.

2. Calculated using the I

2C bus specification values (standard mode: 4700 ns min; high-

speed mode: 1300 ns min).

3. Supported only by the H8S/2239 Group.

4. Not supported by the H8S/2258 Group.

5. Supported only by the H8S/2258 Group.

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