S128 Datasheet, PDF (73/107 Pages) Renesas Technology Corp – Microcontroller

S128
2. Electrical Characteristics
SDA0 and SDA1
tBUF
VIH
VIL
tSTAH
tSCLH
SCL0 and SCL1
P*¹
S*¹
tSf
tSCLL
tSr
tSCL
tSDAH
Note 1. S, P, and Sr indicate the following conditions.
S: Start condition
P: Stop condition
Sr: Restart condition
Figure 2.56 I²C bus interface input/output timing
2.3.12 CLKOUT Timing
tSTAS
Sr*¹
tSP
tSTOS
P*¹
tSDAS
Table 2.38 CLKOUT timing
Parameter
CLKOUT
CLKOUT pin output cycle*¹
CLKOUT pin high pulse width*²
CLKOUT pin low pulse width*²
CLKOUT pin output rise time
CLKOUT pin output fall time
VCC = 2.7 V or above
VCC = 1.8 V or above
VCC = 1.6 V or above
VCC = 2.7 V or above
VCC = 1.8 V or above
VCC = 1.6 V or above
VCC = 2.7 V or above
VCC = 1.8 V or above
VCC = 1.6 V or above
VCC = 2.7 V or above
VCC = 1.8 V or above
VCC = 1.6 V or above
VCC = 2.7 V or above
VCC = 1.8 V or above
VCC = 1.6 V or above
Symbol
t_Ccyc
t_CH
t_CL
t_Cr
t_Cf
Min
62.5
125
250
15
30
150
15
30
150
-
-
-
-
-
-
Max
-
-
-
-
-
-
-
-
-
12
25
50
12
25
50
Unit
ns
ns
ns
ns
ns
Test conditions
Figure 2.57
Note 1. When the EXTAL external clock input or an oscillator divided by 1 (the CKOCR.CKOSEL[2:0] bits are 011b and
the CKOCR.CKODIV[2:0] bits are 000b) is used for output from CLKOUT, specifications in Table 2.38 should be
satisfied with 45% to 55% of input duty cycle.
Note 2. When MOCO is selected as the clock output source (the CKOCR.CKOSEL[2:0] bits are 001b), set the clock
output division ratio to 2 (the CKOCR.CKODIV[2:0] bits are 001b).
R01DS0309EU0100 Rev.1.00
Mar 10, 2017
Page 73 of 107