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UM-WI-006
DA16200 H/W Design Guide
2.10 Interface Pull-Up
It is an open-drain/open-collector communication standard which implies integrated circuits (IC's)
with different voltage supply rails can be connected for communication.
Pull-up resistors need to be connected from the signal lines to the supply to enable communication.
2.10.1
I2C
The pull-up resistance value is a function of rise time.
※ T
rise time, C
r:
b:
Table 13: Parameters from I2C Specification
Parameter
Rise time of both SDA and SCL
can be different from user's board layout. So, it is preferred to calculate the pull-up resistor value
C
b
according to layout condition.
User Manual
CFR0012
VDD_IO
DA16200
Figure 17: I2C Pull-Up Resistors
R
= T
/ (0.8473 x C
p
r
capacitive load for each bus line
Symbol
T
R
Revision 1.5
28 of 44
I2C_CLK
I2C_SDA
)
b
Fast Mode
High Speed Mode
Min
Max
Min
0.02
0.3
-
© 2022 Renesas Electronics
NDA Confidential
Unit
Max
μs
0.05
11-Apr-2022
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