Datasheet

Section 16 I
2
C Bus Interface [H8S/2138 Group Option]
Rev. 4.00 Jun 06, 2006 page 509 of 1004
REJ09B0301-0400
Table 16.8 I
2
C Bus Timing (with Maximum Influence of t
Sr
/t
Sf
)
Time Indication (at Maximum Transfer Rate) [ns]
Item
t
cyc
Indication
t
Sr
/t
Sf
Influence
(Max.)
I
2
C Bus
Specifi-
cation
(Min.)
φ
φφ
φ =
5 MHz
φ
φφ
φ =
8 MHz
φ
φφ
φ =
10 MHz
φ
φφ
φ =
16 MHz
φ
φφ
φ =
20 MHz
t
SCLHO
0.5t
SCLO
(–t
Sr
)
Standard
mode
–1000 4000 4000 4000 4000 4000 4000
High-speed
mode
–300 600 950 950 950 950 950
t
SCLLO
0.5t
SCLO
(–t
Sf
)
Standard
mode
–250 4700 4750 4750 4750 4750 4750
High-speed
mode
–250 1300 1000
*
1
1000
*
1
1000
*
1
1000
*
1
1000
*
1
t
BUFO
Standard
mode
–1000 4700 3800
*
1
3875
*
1
3900
*
1
3938
*
1
3950
*
1
0.5t
SCLO
–
1t
cyc
( –t
Sr
)
High-speed
mode
–300 1300 750
*
1
825
*
1
850
*
1
888
*
1
900
*
1
t
STAHO
Standard
mode
–250 4000 4550 4625 4650 4688 47000.5t
SCLO
–
1t
cyc
(–t
Sf
)
High-speed
mode
–250 600 800 875 900 938 950
t
STASO
1t
SCLO
(–t
Sr
)
Standard
mode
–1000 4700 9000 9000 9000 9000 9000
High-speed
mode
–300 600 2200 2200 2200 2200 2200
t
STOSO
Standard
mode
–1000 4000 4400 4250 4200 4125 41000.5t
SCLO
+
2t
cyc
(–t
Sr
)
High-speed
mode
–300 600 1350 1200 1150 1075 1050
t
SDASO
(master)
Standard
mode
–1000 250 3100 3325 3400 3513 3550
1t
SCLLO
*
3
–
3t
cyc
(–t
Sr
)
High-speed
mode
–300 100 400 625 700 813 850
t
SDASO
(slave)
Standard
mode
–1000 250 1300 2200 2500 2950 3100
1t
SCLL
*
3
–
12t
cyc
*
2
(–t
Sr
)
High-speed
mode
–300 100 –1400
*
1
–500
*
1
–200
*
1
250 400