Subclock (Jp: 36,37) - Fujitsu FLASH-CAN-48P User Manual

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
JP36 (X0A/P35)
JP37 (X1A/P36)
Default: JP36: 1-4, JP37: 1-2
By default, the 32kHz-subclock-crystal is connected to the microcontroller.
UG-900002-20
FLASH-CAN-48P
Chapter 3 Jumpers and Switches
Setting Description
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
Pin 46 is connected to GND (in case that subclock-
3-4
device is used, but no 32kHz crystal is connected)
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
- 14 -
Pin-out JP36:
3
© Fujitsu Semiconductor Europe GmbH
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