RL78G12_15 Datasheet, PDF (51/110 Pages) Renesas Technology Corp – RENESAS MCU

RL78/G12
2. ELECTRICAL SPECIFICATIONS (A, D: TA = −40 to +85°C)
Simplified I²C mode connection diagram (during communication at different potential)
SDAr
RL78
microcontroller
SCLr
Vb
Rb
Vb
Rb
SDA
User's device
SCL
Simplified I²C mode serial transfer timing (during communication at different potential)
t LOW
1/fSCL
t HIGH
SCLr
SDAr
tHD : DAT
tSU : DAT
Remarks 1.
2.
3.
4.
Rb [Ω]: Communication line (SDAr, SCLr) pull-up resistance, Cb [F]: Communication line (SDAr, SCLr)
load capacitance, Vb [V]: Communication line voltage
r: IIC Number (r = 00, 20)
fMCK: 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 (n = 0))
Simplified I²C mode is supported only by the R5F102 products.
R01DS0193EJ0200 Rev.2.00
Sep 06, 2013
Page 51 of 106