FLASH-CAN-48P
Chapter 3 Jumpers and Switches
UG-900002-20
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© Fujitsu Semiconductor Europe GmbH
3.5 Subclock
(JP: 36,37)
Some devices like e.g. MB90F387 support a 32kHz subclock (X0A, X1A), other devices like
MB90FxxxS do not support a subclock but will offer additional port-pins (P35, P36) instead.
Please check the related datasheet.
JP36:
defines usage of Pin 46 (X0A/P35)
JP37:
defines usage of Pin 47 (X1A/P36)
Jumper
Setting
Description
JP36 (X0A/P35)
1-4
Pin 46 is connected to the 32kHz Subclock (X0A)
2-4
Pin 46 is used as P35 and is connected to X4-A28
3-4
Pin 46 is connected to GND (in case that subclock-
device is used, but no 32kHz crystal is connected)
JP37 (X1A/P36)
1-2
Pin 47 is connected to the 32kHz Subclock (X1A)
2-3
Pin 47 is used as P36 and is connected to X4-C29
Default: JP36: 1-4, JP37: 1-2
By default, the 32kHz-subclock-crystal is connected to the microcontroller.
4 1
3
2
Pin-out JP36: