I²C Structure 8
miriac SBC-S32V User Manual
V 1.1
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© MicroSys Electronics GmbH 2017
8.1.2 I²C Devices
8.1.2.1
RTC
The RTC PCF85263A provides year, month, day, weekday, hours, minutes,
seconds and 100th seconds. It can be protected against data loss by the backup
batterie located on the CRX-S32V carrier.
It is accessible via I²C Bus 2 at the 7bit address 0x51. It offers a time stamp input
and an interrupt output, which are both connected to the MCU.
8.1.2.2
RTC Backup Battery
The battery holder is designed for CR2032 batteries. The battery type should have
a nominal voltage of 3.0V. The backup battery is necessary to keep time and date
of the real-time clock on the MPX-S32V module.
Manufacturer:
Würth
Type:
79527141
Used with:
CR2032 batteries, 3V
8.1.3 Digital Visual Interface
The CRX-S32V uses a TFP410PAP as a digital display driver for its HDMI
interface. The device is accessible via I²C bus 2 at the 7bit address 0x3F. The
HDMI port contains a DDC interface which is also connected to the I²C bus 2. This
DDC interface is disabled after RESET and must be enabled by a low output state
of the CPU port PH11, i.e. GPIO[123] or DCU_TAG. Care must be taken due to the
fact, that access addresses of unknown external devices may collide with other
devices located on the I²C bus 2
Figure 30: Battery Holder & Battery
