Critical Link MityARM-335x, Руководство пользователя

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Critical Link, LLC
www.CriticalLink.com MityARM-335x Development Kit
www.MityDSP.com 12 April 2013
17
Copyright © 2007-2013, Critical Link LLC
Boot Configuration header
– J106
The boot mode, as determined by the 12 BOOTCONFIG pins, is selected on the rising
edge of the PWRONRSTn Reset Input Pin of the AM335x processor which is controlled
by the PMIC of the MityARM-335x module. Each boot configuration pin on the
development kit is connected to a weak pull up, ‘1’, unless a jumper is placed across the
header pins which pulls that configuration pin down to ground, ‘0’.
The MityARM-335x Development Kits default boot configuration header mode is shown
in Figure 8 below. As seen this equates to a boot configuration setting of [0] to [11],
111011111111
. Please reference the AM335x Technical Reference Manual for
complete details on how the vast array of boot mode options.
There are a total of 16 boot configuration pins that are registered by the AM335x
processor however [12] to [15] are fixed,
0010
, on the MityARM-335x module.
Figure 8: Default Development Kit Boot Jumper Mode
TI JTAG Interface
– J101
Table 15: J101 JTAG Pin Assignments
Pin Schematic Signal SoM Pin Type Standard Notes
1 TMS 172
2 TRST_N 174
3 TDI 168
4 GND - Power
5 +3.3V - Power
6 Key - - -
7 TDO 170
8 GND - Power
9 TCK_RET 166
10 GND - Power
11 TCK 166
12 GND - Power
13 EMU0 160
14 EMU1 162