Datasheet

RL78/G12 2. ELECTRICAL SPECIFICATIONS (A, D: T
A = −40 to +85°C)
R01DS0193EJ0200 Rev.2.00
Sep 06, 2013
Page 37 of 106
Simplified I
2
C mode connection diagram (during communication at same potential)
RL78
microcontroller
SDAr
SCLr
SDA
SCL
User's device
V DD
R b
Simplified I
2
C mode serial transfer timing (during communication at same potential)
SDAr
t
LOW
tHIGH
tHD:DAT
SCLr
t
SU:DAT
1/fSCL
Remarks 1. Rb [Ω]:Communication line (SDAr) pull-up resistance
Cb [F]: Communication line (SCLr, SDAr) load capacitance
2. r: IIC number (r = 00, 01, 11, 20), h: = POM number (h = 0, 1, 4, 5)
3. f
MCK: Serial array unit operation clock frequency
(Operation clock to be set by the serial clock select register m (SPSm) and the CKSmn bit of serial
mode register mn (SMRmn). m: Unit number (m = 0, 1), n: Channel number (0, 1, 3))
4. Simplified I
2
C mode is supported only by the R5F102 products.