Neoway N75 - Figure 3-35 I2 Cconnection; Table 3-10 I2 C Feature Parameters

N75
Hardware User Guide
Copyright © Neoway Technology Co., Ltd
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host mode only. Its feature parameters and connection are shown in the following table and figure.
Table 3-10 I2C feature parameters
IO Level (V)
Mode
Max. Speed
1.8V (VDD)
Standard-mode
100 kbit/s
Fast-mode
400 kbit/s
Fast-mode Plus
1 Mbit/s
Figure 3-35 I2Cconnection
I2C_SCL
I2C_SDA
DATA
SCL
I2C device
N75 module
1.8V
2.2kΩ 2.2kΩ
Schematic Guidelines
⚫
If the levels of slave I2C device and N75 do not match, add a level shifting circuit. Refer to
Figure 3-20.
⚫
Some pins can be multiplexed for I2C function. Connect external pull-up resistors to these pins
when they are used for I2C function. For details, see section 3.7 MUX Interfaces.
PCB Design Guidelines
⚫
Do not cross other traces if possible. If crossing is inevitable, route the I2C traces perpendicular
to other traces.
⚫
Keep I2C traces far away from areas that might introduce ESD.
⚫
Surround signal traces with ground.
The following figures and tables show the I2C data transmission, I2C timing, and parameters.