Test-Points; Status Display - Fujitsu SK-MB9EF120-002 User Manual

4.3 Test-Points

Testpoints are not for permanent connection, but mostly for failure-tracking. Normally, there is no
need to access them.
Name Label
TP6 SubClk
TP5 MainClk
TP1 SYSC_CKOT
SYSC_CKOT
TP2
X
TP3 RTC_WOT
WDG_OBSER
TP4
VE
TP7 HSF_SCK
TP8 HSF_SS
TP9 HSF_SIO0
TP10 HSF_SIO1
TP11 HSF_SIO2
TP12 HSF_SIO3
TP13 GXF_SCK
TP14 GXF_SS
TP15 GXF_SIO0
TP16 GXF_SIO1
TP17 GXF_SIO2
TP18 GXF_SIO3
The crystal testpoints TP5 and 6 are very sensitive to noise and load-factors, especially capacitive
loads can change the frequency dramatically. If possible, the clocks should be measured indirectly
using a high-speed timer or SYSC_CKOT.

4.4 Status Display

For user information, there are four LEDs on the board. Each power-rail (the supply generated on-
board), is monitored by a single LED.
In addition, the reset-LED shows the status of the reset-line. For the default configuration and no
external reset (JTAG, button or from a plugged-under PCB), this is the status of the system-voltage
supervisor (SVS). It will be lit if any voltage-rail is out of its allowed limits.
Name Color
LD1 orange
LD2 yellow
LD3 green
LD4 red
UG-9E0010-11
SK-MB9EF120-002,-003
Configuration and Test-Points
Description
input of 32768Hz crystal-oscillator (RTC, etc.).
main clock reference crystal (Q1).
MCU-port P0_41 which can have this signal multiplexed on its
output.
MCU-port P0_42 which can have this signal multiplexed on its
output.
MCU-port P0_40 which can have this signal multiplexed on its
output.
MCU-port P0_43 which can have this signal multiplexed on its
output.
High-Speed QSPI interface (with flash)
Graphics-Controller QSPI interface (with flash)
Description (when lit)
5V0 rail up
3V3 rail up
1V2 rail up (driven by 3V3-rail)
reset active
- 16 - © Fujitsu Semiconductor Europe GmbH
Position
top F-9
top E/F-8
top H/I-5/6
top H-5/6
top I-5/6
top F-10
top K-5
top L-5
top K-5
top K/L-5
top L-5
top L-5
top L/M-5
top M/N-5
top M-5
top M-5
top N-5
top N-5
Position
top P-15
top O/P-15
top O-15
top O/P-14