Murata PE25203 User Manual page 5

The PE25203 EVK has two types of PCB headers:
■
Three-way PCB headers are used to configure the EVK
■
Two-way PCB headers are used to enhance the functionality of the EVK.
Jumper sockets must be fitted on the H1 and H2 PCB headers before applying power to the EVK. The settings are
loaded at IC power-up. If H2 is changed during operation, the system must be disabled and then enabled to allow the
IC to load the new settings. H3 can be changed during operation.
Table 3 provides information about each three-way PCB header. Figure 2 shows how to use a jumper to set the three-
way PCB header in HIGH or LOW position.
HEADER SIGNAL NAME
H1
H2
H3
H4
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DOC-111189-2 (10/2023)
IC enable pin. Logic high enables the IC,
ENABLE
logic low disables the IC.
Selects charge pump clock mode (logic high
= fixed frequency, logic low = cycle skip).
FF/CS
Read at IC power up. Value in this pin can be
changed when EN = logic low.
Selects the charge pump voltage division
ratio. This pin must not be allowed to float.
MODE = logic high or VIN or 3.6V for divide-
MODE
by-2 mode.
MODE = logic low for divide-by-3 mode
External VDD input pin. In this mode, the IC
is powered from the external VDD instead of
the internally generated VDD. The part does
not need this to be supplied to operate, but if
EXT VDD
externally applied, it can increase the system
efficiency. This pin can also be connected to
VOUT pin and if not used, connect it to
ground.
Table 3. Three-way PCB Headers Information
Figure 2. Three-way PCB Header Configuration Settings Example
FUNCTION HIGH LOW
Enable Disable
Fixed
Cycle skip
Frequency
Divide-by-2 Divide-by-3
VOUT GND
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