Digital Spectrum TMS320C6413, Техническое описание

Страница: 16 / 78

Spectrum Digital, Inc
1-8 TMS320C6413/C6418 EVM Module Technical Reference
1.6.3 Oscillator Disable
The OSC_DIS pin is used to enable the on chip oscillator. On the EVM an external
oscillator is used as the default configuration. However, the board is populated with a
25 Mhz crystal which is enabled by populating JP4 (11 to 12).
For proper operation the CLKINSEL jumper needs to be in configured appropriately to
enable the on board oscillator to control the PLL logic when using enabling or disabling
the on chip oscillator.
1.6.4 Endian Select
The C6413/C6418 can be operated in little endian or big endian memory modes. The
default mode on the EVM is little endian (jumper JP4-13 to 14 removed). When the
jumper is installed the board operates in big endian mode.
1.7 EMIFA Configuration Options
External addresses lines A19-A22 are used to configure the boot mode and EMIF
clock selection at reset. Four pull up and four pull down resistor locations are available
on the EVM to control this configuration. The selections are outlined.
1.7.1 Boot Options
At reset address lines A21 and A22 are sampled to determine the boot option of the
processor. although there are four modes available only 2 modes are not reserved.
These are 8 bit boot from CE1 which is the default on the EVM and no boot.
NOTE:
OSC_DIS jumper should always be populated.
Disabling the oscillator is for chip test functions
only.