Texas Instruments Hercules TMS570LS31x, Руководство пользователя

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19 SPNU509C – September 2011 – Revised November 2018
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Physical Description
The S2 DIP switch is reserved for user application general purpose. Table 2-11 describes the function of
each channel on S2.
(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.
Table 2-11. S2 DIP Switch Functions
Switch OFF Position ON Position
S2:1
(1)
USB Host0 Disabled USB Host0 Enabled
S2:2
(2)
USB Host1 Disabled USB Host1 Enabled
S2:3
(2)
USB Device Disabled USB Device Enabled
S2:4
(3)
Ethernet Disabled Ethernet Enabled
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.
Table 2-12. Jumpers
Jumper Number OFF ON
J8 5 V ADC 3.3 V ADC
J13 SDRAM on SDRAM Off
2.6 S4, Power On Reset Switch
TMS570LS31 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 TMS570LS3137 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 TMS570LS3137 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.