Rohm BD868 0MUF-C Series, Руководство пользователя

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User ’ s Guide
© 2022 ROHM Co., Ltd.
No. 65UG013E Rev.001
July 2022
VO1 Test point for Output 1
VO2 Test point for Output 2
VO3 Test point for Output 3
VO4 Test point for Output 4
SDA Test point for serial interface data
SCL Test point for serial interface clock
WAROUTB Test point for Warning output
RSTOUTB Test point for Reset output
VIN Test point for board Input Voltage
GND Test point for Ground
Table 2: List of access points
5.5. Stand-alone functioning
BD868x0-DB has been designed to be used in combination with the PMIC-MB-EVK and the GUI interface.
However, the DB can also be operated in stand-alone mode without the GUI software.
In this case, an input voltage must be applied either to CN1 (positive voltage V
IN
connected to pin #1 to
#10 and GND to pin #31 to #40) or to the related access points V
IN
and GND.
The jumper at CN5 must be put on position 5-6.
5.5.1. I
2
C and Warning/Reset Output Pull-up Jumper
In normal operation (i.e., when plugged into the MB), the pull-up voltage for I
2
C communication and
warning/reset outputs is given by the level shifter installed on the MB. In this case, the jumper of CN5 must
be removed.
However, in case of stand-alone use or in case of communication problems between DB and MB, a
jumper on connector CN5 can be placed to have a different voltage reference.
More precisely, there are 3 possible pull-up voltages depending where the jumper is placed on connector
CN5:
- 1.8V LDO from MB (if connected) if jumper is placed between pin #1 and pin #2
- 1.5V from internal regulator of BD868x0 if jumper is placed between pin #3 and pin #4
- 1.8V from output VO3 of DB if jumper is placed between pin #5 and pin #6