Subclock (Jp: 55,56) - Fujitsu ADA-91270-90340-100PFV V1.0 User Manual

4.3 Subclock (JP: 55,56)

Some devices support a 32 kHz subclock (X0A, X1A), other devices do not support a
subclock but will offer additional port-pins (e.g. P40, P41) instead.
Please check the related datasheet.
JP55: defines usage of microcontroller pin 11 (X0A/P40)
JP56: defines usage of microcontroller pin 12 (X1A/P41)
Jumper
SUB - Pin11
P40 - Pin11
JP55 (X0A/P40)
GND - Pin11
JP56 (X1A/P41)
Default: JP55: 1-4, JP56: 1-2
By default, the 32kHz-subclock-crystal is connected to the microcontroller.
UG-910012-16
ADA-91270-90340-100PFV v1.0
Chapter 4 Jumpers and Switches
Setting Description
Pin 11 is connected to the 32 kHz Subclock (X0A)
Pin 11 is used as P40 and is connected to X3-11
Pin 11 is connected to GND (in case that subclock-
device is used, but no 32kHz crystal is connected)
1-2 Pin 12 is connected to the 32kHz Subclock (X1A)
2-3 Pin 12 is used as P41 and is connected to X3-12
- 12 -
Pin-out JP55:
© Fujitsu Microelectronics Europe GmbH
GND
P40 Pin11
SUB