peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 123

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

If something went wrong during the download, the OAK sends the command “Error
during boot” and then waits for the command “Start boot procedure from the µP”. When
receiving this command, the OAK boot routine restarts the boot procedure and waits for
the “write program memory command”.
2.7.9.6
For enabling the µP boot, there are some predefined opcodes used by the boot routine.
These opcodes are valid only for the boot routine. When the user program is executed
later, these opcodes have no affect.
There are two separate sets of opcodes, one for the µP mail box and the other for the
OAK mail box.
µP Opcodes
Finish Boot Procedure
Description: Finish the boot procedure (the µP has finished loading the program RAM).
2.7.9.7
Description: Write the content of registers MDT1- MDT
Operation:
Example:
Note: The program RAM is write protected. It can be written only if the write is enabled
Semiconductor Group
0
0
by writing a special code to a register within the DCU (see the DCU description for
more details).
Mail Box Instructions Format
Write Program Memory Command
RAM address (MDT0) −(MDT0 +NUM −1), consecutively.
Write to program memory from address within MDT0 up to (MDT0 +
NUM −1). The data to be written is taken from MDT1 to MDT5. The
content of MDT1 is written to the address which resides within MDT0, the
content of MDT2 is written to the address (MDT0 +1), and so on. Notice
that allowed values of NUM are 1…5.
MDT0 = 20A0
Program RAM address 20A0
Program RAM address 20A1
Program RAM address 20A2
0
0
0
1
H
opcode 00101011 (NUM = 3). It will result with:
0
0
2-77
H
H
H
≤ MDT1
≤ MDT2
≤ MDT3
0
1
Functional Block Description
NUM
1
N
(NUM=1…5) to the program
1
U
PEB 20560
2003-08
M
1