UPD78F1502AGK-GAK-AX Datasheet, PDF (935/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 31 ELECTRICAL SPECIFICATIONS
(2) Serial interface: Serial array unit (18/18)
Simplified I²C mode connection diagram (communication at different potential)
SDAr
78K0R/Lx3
microcontrolles
SCLr
Vb
Rb
Vb
Rb
SDA
User's device
SCL
Simplified I²C mode serial transfer timing (communication at different potential)
tLOW
1/fSCL
tHIGH
SCr
SDAr
tHD:DAT
tSU:DAT
Caution Select the TTL input buffer and the N-ch open drain output (VDD tolerance) mode for SDAr and the N-ch
open drain output (VDD tolerance) mode for SCLr by using the PIMg and POMx registers.
Remarks 1. Rb[Ω]:Communication line (SDAr, SCLr) pull-up resistance, Vb[V]: Communication line voltage
2. r: IIC number (r = 10, 20), g: PIM number (g = 1, 7), x: POM number (x = 1, 7, 8)
R01UH0004EJ0501 Rev.5.01
919
Jun 20, 2011