RSK+RZA1H
6. Configuration
R20UT3007EG0200 Rev. 2.00
Page 39 of 53
May 17, 2015
6.2
Power Supply Configuration
Power to the RSK+RZA1H board should be applied to connector CN5, from a 5mm diameter centre positive
plug, at either 5Vdc or 12Vdc.
The header PWR_SEL is used to select operation from a 12V or 5V supply.
It is essential that if a 12V supply is used that PWR_SEL is
NOT
linked on pins 2-3 or an overvoltage will be
applied to the MCU and associated devices, resulting in likely destruction of the whole board.
Table 6.16 describes the jumper settings for the PWR_SEL header
PWR_SEL
Select Input power voltage setting
Link 1-2
Link 2-3**
12V supply
5V supply
** Do NOT connect a 12V input source to the RSK+ when PWR_SEL jumper is set to link pins 2-3
Table 6.16: PWR_SEL Header Configuration
There are 2 headers available that can be used to measure the current taken by the MCU during operation.
JP4 can be used to measure the MCU core current and JP6 can be used to measure current drawn by the
MCU port pins, by shorting them via a current meter. In order to use these functions, it is necessary to remove
links R24 and R26 respectively. Table 6.17 provides a summary.
JP4
MCU Core Current Measurement
Remove R24 and short JP4 with meter to measure MCU core current.
JP6
MCU Port Pins Current Measurement
Remove R26 and short JP6 with meter to measure MCU port pin current.
Table 6.17: MCU Current Measurement Headers
6.3
Ethernet Configuration
Table 6.18 below details the options configurable for the Ethernet function via the 8-way DIP switch SW4.
SW4
LAN Strap Option
Off
On
Signal name
1
Auto MDI-X Enable
1
0
ET_CRS
2
Q-Autoneg Enable
1
0
ET_RXCLK
3
Phy Adr0
0
1
ET_RXD0
4
Phy Adr1
0
1
ET_RXD1
5
Full/Half #
1
0
ET_RXD2
6
Autoneg EN
1
0
ET_RXD3
7
MII/RMII #
1
0
ET_RXER
8
Fast (J) / Std (JK)
1
0
ET_TXCLK
Table 6.18: Ethernet configuration via SW4
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