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RL78/G1A CHAPTER 29 ELECTRICAL SPECIFICATIONS (T
A = −40 to +85°C)
R01UH0305EJ0200 Rev.2.00 888
Jul 04, 2013
CSI mode connection diagram (during communication at different potential)
RL78
microcontroller
SCKp
SOp
SCK
SI
User device
SIp SO
V
b
R
b
<Slave>
Remarks 1. R
b[Ω]: Communication line (SOp) pull-up resistance, Cb[F]: Communication line (SOp) load capacitance,
V
b[V]: Communication line voltage
2. p: CSI number (p = 00, 10, 20), m: Unit number (m = 0, 1), n: Channel number (n = 00, 02, 10),
g: PIM and 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. CSI01, CSI11, and CSI21 cannot communicate at different potential. Use other CSI for communication at
different potential.