Fujitsu SK-MB9EF120-002 Manual do utilizador - Página 15
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Name
Label
JP12
SVS_EN
JP13
CAN_RXD
JP14
CAN_TXD
JP15
UART_RXD
JP16
UART_TXD
R1
RTCKfb
On wide jumpers, the cap can be replaced by an ampere meter to measure current. However, care
must be taken to avoid inducing noise into the connected cables. Alternatively, if the cap is removed,
external power can be feed into the corresponding domain. Caution: do not back-drive current into
the supply-rails. Check the schematics before connecting an external power-supply to a
jumper's output pin (the pin which drives the power-domain). Double-check before powering
up!
DVCC, AVCC5 and VDP5 (see further description below) must be set to the same voltage-rail
when zero point detection (ZPD) on any of the SMC ports is to be used. Check the datasheet
for further requirements on the combination of voltages.
When using external supplies, the allowed voltages specified in the datasheet must be
observed. This also applies to the ports driven by the domains.
4.2 Headers
Headers are intended to access interesting points on the PCB. They may have the same sizes as
regular jumpers.
Name
Label
HDR1
5V0
HDR2
VIN_prot
HDR3
3V3
HDR4, 5 GND
HDR6
1V2
© Fujitsu Semiconductor Europe GmbH
SK-MB9EF120-002,-003
Configuration and Test-Points
Description
closed = enable resets from system-voltage
supervisor chip.
As the SVS also monitors the reset-button,
this also disables manual reset if open.
Quite likely not to be changed.
closed = connect RXD on CAN-Interface to
MCU-port P2_41
closed = connect TXD on CAN-Interface to
MCU-port P2_40
closed = connect RXD on UART-Interface
to MCU-port P0_45
closed = connect TXD on UART-Interface
to MCU-port P0_47
closed = enable RTCK
open to avoid disturbance on TCK line if
RTCK is not used. If operating on lower
frequencies, can be left connected if no
problems arise with TCK.
Description
5.0V rail voltage measuring header.
Do not inject any current here!
Filtered and protected (against surges and reverse
polarity) input voltage. May be used to inject an
external supply.
3.3V rail voltage measuring header.
Do not inject any current here!
Access-points to the GND-plane. Can be used as
reference for scopes, logic-analyzers, voltmeters, etc.
1.2V rail voltage measuring header.
Do not inject any current here!
Type
2-pin small
2-pin small
2-pin small
2-pin small
2-pin small
solder, 1R
- 15 -
Default
Position
closed
top N/O-9/10
closed
top J-4/5
closed
top I/J-4/5
closed
top O/P-6/7
closed
top O-6/7
closed
bottom K/L-7
Type
Position
2-pin wide
top D/E-2/3
2-pin wide
top E-13
2-pin wide
top D-6
3-pin wide
top B-14, O-11
(each)
2-pin wide
top E/F-9
UG-9E0010-11