Programming the dspstak™ 21262sx
The dspstak 21262sx can be programmed in a variety of ways. In most cases, programs are
uploaded via either the USB port or RS-232 port into the on-board serial flash memory. You may
also load and execute programs through the JTAG port by using an emulator.
Programming Modes
The dspstak 21262sx has eight different programming modes that are assigned via jumper on the
Configuration Header (JH5). The purpose of the programming modes is to establish what the
dspstak 21262sx will do when it comes out of reset. Four of the programming modes are reserved
for standard dspstak 21262sx functions and the remaining four are available for user programs.
For example, you could use Mode 0 as a means to bootload one version of your application and
use Mode 1 to bootload another. The dspstak 21262sx uses Mode 7 as Clock Programming Mode
and Mode 6 as Program Uploading Mode. Mode selection is under the control of the Peripheral
Microcontroller. You can determine the mode through the Peripheral Microcontroller API.
Mode – Jumpers (JH5)
Mode Name
M2 M1 M0
0 User
0
On On On
1 User
1
On On Off
2 User
2
On Off On
3 User
3
On Off Off
4 Reserved
Off On On
5 Reserved
Off On Off
6 Program
Uploading
Off Off On
7 Clock
Programming
Off Off Off
* Jumper On = 0
dspstak™ 21262sx User Manual
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