Users Manual Part 2

SIM8260A_Hardware Design_V1.05
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3.10 I2C Interface
SIM8260A default support two I2C interfaces, meet I2C specification version 5.0, and data rate up to 400
Kbps. The following figure shows the I2C bus reference circuit.
Figure 32: I2C reference circuit
Table 38: Definition of I2C interface
Pin name
Pin no.
Electrical
description
description
Comment
I2C1_SCL
M7
OD
P3
I2C1 default use for codec
Pull up to VDD_EXT
externally
I2C1_SDA
P7
OD
P3
I2C2_SCL
AB7
OD
P3
I2C2 default use for sensor
Pull up to VDD_EXT
externally
I2C2_SDA
Y7
OD
P3
 SDA and SCL need to pull up to VDD_EXT by a 2.2K resistor externally.
 For more details about AT commands please refer to document [1] in the appendix.
NOTE
NOTE