Product Info

Automotive Module Series
AG35 Hardware Design
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3.22. RTC
AG35 has a real time clock within the PMIC, but has no dedicated RTC power supply pin.
The RTC is powered by VBAT_BB. If VBAT_BB is removed, the RTC will not be maintained.
If RTC needs to be maintained, then VBAT_BB must be powered all the time.
3.23. HSIC Interface*
AG35 provides a HSIC interface for EAVB. HSIC is a 2-signal source synchronous serial interface which
uses 240MH
Z
DDR signaling to provide High-Speed 480Mbps USB transfers which are 100% host driver
compatible with traditional USB cable-connected topologies. The HSIC interface supports the following
features:
 High-Speed 480Mbps data rate only
 No power consumed unless a transfer in progress
 Signals driven at 1.2V standard LVCMOS levels.
The following table shows the pin definition of HSIC interface.
Table 30: Pin Definition of HSIC Interface
Pin Name
Pin No.
I/O
Description
Comment
HSIC_STROBE
194
IO
High speed inter chip interface -
strobe
1.2V power domain.
If unused, keep them open.
HSIC_DATA
195
IO
High speed inter chip interface -
data
The following table shows the layout guidelines of HSIC interface.
Table 31: Design Guidelines for HSIC
Designs
Guidelines
General
Data rate
480Mbps
NOTE