I2C Interface; Application - Sierra Wireless AirPrime BX3100 Hardware Integration Manual

Rev 3 Sep.18
2
4.4 I C Interface
The AirPrime BX310x module provides two I
serial ports (bus interface) based on [2] The I2C Bus Specification, Version 2.1,
January 2000 (Phillips Semiconductor document number 9398 393 40011).
The interfaces use the pins indicated in
2
Table 4-4: I C Interface Pins
Pin Signal name
9 I2C1_SCL
17 I2C1_SDA
53 I2C2_SDA
54 I2C2_SCL
a. Leave open any pins that are not used.
This implementation of the I
• Supported voltage:
· Primary I2C (3.3 V, configurable)
· Secondary I2C (3.3 V)
• Standard-mode interface—Data transfer rates up to 100 kbit/s
• Fast-mode interface—Data transfer rates up to 400 kbit/s)
• Master mode operation
• Addressing modes—7-bit; 10-bit; Dual addressing mode
External 2.2 k pull-up resistors must be applied to I
page 17).
2
For I C bus details, including I2C bus waveform and timing details, refer to the
I2C Bus Specification.

4.4.1 Application

AirPrime BX310x
Wi-Fi/BT Module
I2C1_SCL
I2C1_SDA
I2C2_SDA
I2C2_SCL
2
Figure 4-1: Example of I C Bus Application
2
C (Inter-Integrated Circuit) dedicated
Table 4-4.
a
Direction Function
I/O Primary I2C interface
I/O Primary I2C interface
I/O Secondary I2C interface
I/O Secondary I2C interface
2
C interface includes the following characteristics:
VDD_PADS_BB
2.2K
2.2K
VGPIO
2.2K 2.2K
17
Interfaces Specification
Voltage Level
VDD_PADS_BB
VGPIO
2
C signals (see Figure 4-1 on
Customer
Application
41112607