Specifications

CINTERION
®
BGS12 Hardware Interface Description
Contents
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Page
BGS12 HID_V00.
915
Confidential / Released
2019
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01
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07
3.14 I
2
C Interface
The signal lines of the I
2
C interface are shared with the GPIO9 and GPIO10 signal pads.
The power supply domain voltage level for 2.8V, the I
2
C interface pads voltage level (see Figure 14).
I
2
C is a serial data transfer bus. Only normal (100kbps) and fast modes (400kbps) are supported. It
consists of two lines, the serial data line I2CDAT (GPIO10) and the serial clock line I2CCLK (GPIO9).
The module acts as a single master device, e.g. the clock I2CCLK is driven by the module. I2CDAT is a
bidirectional line. Each device connected to the bus is software addressable by a unique 7- bit address,
and simple master/slave relationships exist at all times. The module operates as master- transmitter or
as master receiver. The customer application transmits or receives data only on request of the module.
In the application I2CDAT and I2CCLK lines need to be connected to a positive supply voltage via a pull-
up resistor. For electrical characteristics please refer to Table 22.
Figure 27: I2C interface connected to VCC of application
Figure 28: I2C interface connected to VDIG