Renesas rl78 User Manual
RL78/G1A
CHAPTER 29 ELECTRICAL SPECIFICATIONS (T
A
=
−40 to +85°C)
R01UH0305EJ0200 Rev.2.00
892
Jul 04, 2013
Simplified I
2
C mode connection diagram (during communication at different potential)
SDAr
SCLr
SDA
SCL
User device
V
b
R
b
V
b
R
b
RL78
microcontroller
Simplified I
2
C mode serial transfer timing (during communication at different potential)
SDAr
t
LOW
t
HIGH
t
HD : DAT
SCLr
t
SU : DAT
1/f
SCL
Remarks 1. R
b
[
Ω]: Communication line (SDAr, SCLr) pull-up resistance, C
b
[F]: Communication line (SDAr, SCLr) load
capacitance, V
b
[V]: Communication line voltage
2.
r: IIC number (r = 00, 10, 20), g: PIM, POM number (g = 0, 1)
3.
f
MCK
: Serial array unit operation clock frequency
(Operation clock to be set by the CKSmn bit of serial mode register mn (SMRmn). m: Unit number,
n: Channel number (mn = 00, 02, 10)
4. IIC01, IIC11, and IIC21 cannot communicate at different potential. Use IIC00, IIC10, or IIC20 for
communication at different potential.