F2837xS /2807x board setting

Both piccolo series TMS320F2807x and defino series TMS320F2837xS check below three pins at the reset to decide the booting mode.

MODE	GPIO72	GPIO84	/TRST	Boot mode
Mode EMU	X	X	1	Emulation Boot
Mode 0	0	0	0	Parallel I/O
Mode 1	0	1	0	SCI (RAM boot)
Mode 2	1	0	0	Wait Boot Mode
Mode 3	1	1	0	Get Mode (factory default = boot to flash)

easyDSP uses two kinds boot mode. SCI boot mode for RAM booting, GetMode boot mode for flash rom booting.
Below connection is recommended between easyDSP and MCU.

- Factory default setting is assumed
- power pin (#4) of easyDSP 5x2 header should be connected to 3.3V
- connect SCIRXDA = GPIO85, SCITXDA = GPIO84
- In case there is a reset IC between easyDSP /RESET and MCU /XRS, it should transfer easyDSP /RESET signal to MCU /XRS within 0.5sec
- TX/RX pins are directly connected to MCU pins
- In case you insert buffer IC between easyDSP header and MCU, place buffer IC directly to easyDSP header so that all resistors can be connected to directly MCU
- /BOOT pin is connected to GPIO72 via 2kΩ series resistor
- /RESET pin is connected to reset generation circuit of MCU board
(Time duration of /RESET pin is around 500msec)
- In case you use pull-up resistor to each pin, the value of pull-up resistor should be higher than a few kilo ohm since there is 100Ω series resistor inside easyDSP pod

Please be careful when you use your own pull-up or pull-down resistor on the easyDSP signal pins. Please use appropriate filter circuit to your reset generation circuit to prevent unintentional reset generation.