Renesas H8S/2633 Series Hardware Manual page 905

2
Table 18-8 I C Bus Timing (with Maximum Influence of t
t
cyc
Item Indication
t 0.5t Standard
SCLHO SCLO
(–t ) mode
Sr
High-speed
mode
t 0.5t Standard
SCLLO SCLO
(–t ) mode
Sf
High-speed
mode
t 0.5t – 1t Standard
BUFO SCLO cyc
( –t ) mode
Sr
High-speed
mode
t 0.5t – 1t Standard
STAHO SCLO cyc
(–t ) mode
Sf
High-speed
mode
t 1t Standard
STASO SCLO
(–t ) mode
Sr
High-speed
mode
t 0.5t + 2t Standard
STOSO SCLO cyc
(–t ) mode
Sr
High-speed
mode
2
t 1t * – 3t Standard
SDASO SCLLO cyc
(master) (–t ) mode
Sr
High-speed
mode
2 2
t 1t * – 3t * Standard
SDASO SCLL cyc
(slave) (–t ) mode
Sr
High-speed
mode
t 3t Standard
SDAHO cyc
mode
High-speed
mode
Notes: *1 Does not meet the I
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
interface specifications are met must be determined in accordance with the actual setting conditions.
*2 Calculated using the I
Time Indication (at Maximum Transfer Rate) [ns]
2
I C Bus
t /t Specifi-
Sr Sf
Influence cation
(Max.) (Min.)
–1000 4000
–300 600
–250 4700
–250 1300
–1000 4700
–300 1300
–250 4000
–250 600
–1000 4700
–300 600
–1000 4000
–300 600
–1000 250
–300 100
–1000 250
–300 100
0 0
0 0
2
C bus interface specification. Remedial action such as the following is necessary: (a) secure a
2
C bus specification values (standard mode: 4700 ns min.; high-speed mode: 1300 ns min.).
/t )
Sr Sf
ø = ø = ø =
5 MHz 8 MHz 10 MHz
4000 4000 4000
950 950 950
4750 4750 4750
1 1 1
1000* 1000* 1000*
1 1 1
3800* 3875* 3900*
1 1 1
750* 825* 850*
4550 4625 4650
800 875 900
9000 9000 9000
2200 2200 2200
4400 4250 4200
1350 1200 1150
3100 3325 3400
400 625 700
3100 3325 3400
400 625 700
600 375 300
600 375 300
ø = ø = ø =
16 MHz 20 MHz 25 MHz
4000 4000 4000
950 950 950
4750 4750 4750
1 1 1
1000* 1000* 1000*
1 1 1
3938* 3950* 3960*
1 1 1
888* 900* 910*
4688 4700 4710
938 950 960
9000 9000 9000
2200 2200 2200
4125 4100 4080
1075 1050 1030
3513 3550 3580
813 850 880
3513 3550 3580
813 850 880
188 150 120
188 150 120
ø =
28 MHz
4000
950
4750
1
1000*
1
3964*
1
912*
4713
964
9000
2200
4071
1021
3593
893
3593
893
107
107
2
C bus
851