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Jumpers
The S2 DIP switch is reserved for user application general purpose.
each channel on S2.
Switch
S2:1
S2:2
S2:3
S2:4
(1)
S2:1 indicates slide 1 on the S2 DIP switch, S2:2 indicates slide 2 on the S2 DIP switch, and so on.
(2)
S2:2 and S2:3 cannot be enabled at the same time since those two ports have pinmux.
(3)
To use Ethernet, S2:4 should be enabled and all other have to be disabled.
2.5
Jumpers
The HDK board has two jumpers that are used to enable and disable the on-board SDRAM and select 5 V
or 3.3 V ADC.
Jumper Number
J8
J13
2.6
S4, Power On Reset Switch
RM48 MCU has two resets: warm reset (nRST) and power-on reset (nPORRST). Switch S4 is a
momentary switch that asserts power on reset to the RM48L952 device. The nPORRST condition is
intended to reset all logic on the device including the test and emulation circuitry.
2.7
S3, System Reset Switch
Switch S3 is used to assert a warm reset the RM48L952 device. Warm reset does not reset any test or
emulation logic. The reset signal from window watchdog will also assert a warm reset to the MCU. The
warm reset can be invoked by pushing nRST button, or by RESET signals from XDS100 CPLD, ARM
JTAG SREST.
18
Physical Description
Table 2-11. S2 DIP Switch Functions
(1)
(2)
(2)
(3)
Table 2-12. Jumpers
Copyright © 2011–2013, Texas Instruments Incorporated
Table 2-11
OFF Position
USB Host0 Disabled
USB Host1 Disabled
USB Device Disabled
Ethernet Disabled
OFF
5 V ADC
SDRAM on
SPNU508B – September 2011 – Revised September 2013
www.ti.com
describes the function of
ON Position
USB Host0 Enabled
USB Host1 Enabled
USB Device Enabled
Ethernet Enabled
ON
3.3 V ADC
SDRAM Off
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