Core Configuration
Bootstrap Program
MOTOROLA
DSP56309UM/D 4-7
4.3.4
Mode 9: Boot from Byte-Wide External Memory
The bootstrap program loads instructions through Port A from external byte-wide
memory, starting at P:$D00000. The SRAM memory access type is selected by the values
in address attribute register 1 (AAR1). Thirty-one wait states are inserted between each
memory access. Address $D00000 is reflected as address $00000 on Port A signals
HA0-HA17.
4.3.5
Mode A: Boot from SCI
Instructions are loaded through the SCI. The bootstrap program sets the SCI to operate
in 10-bit asynchronous mode, with one start bit, eight data bits, one stop bit and no
parity. Data is received in this order; start bit, eight data bits (LSB first), and one stop bit.
Data is aligned in the SCI receive data register with the LSB of the least significant byte
of the received data appearing at bit 0. The user must provide an external clock source
with a frequency at least 16 times the transmission data rate. Each byte received by the
SCI is echoed back through the SCI transmitter to the external transmitter.
4.3.6
Mode B: Reserved
This mode is reserved for future use.
Mode
MODD
MODC
MODB
MODA
Reset
Vector
Description
9
1
0
0
1
$FF0000
Boot from byte-wide
memory (at $D00000)
Mode
MODD
MODC
MODB
MODA
Reset
Vector
Description
A
1
0
1
0
$FF0000
Boot through SCI
Mode
MODD
MODC
MODB
MODA
Reset
Vector
Description
B
1
0
1
1
$FF0000
Reserved
Содержание DSP56309
Страница 25: ...xxii DSP56309UM D MOTOROLA Figure D 25 Port E Registers PCRE PRRE PDRE D 39 ...
Страница 30: ...MOTOROLA DSP56309UM D 1 1 SECTION 1 DSP56309 OVERVIEW ...
Страница 47: ...1 18 DSP56309UM D MOTOROLA DSP56309 Overview DSP56309 Architecture Overview ...
Страница 48: ...MOTOROLA DSP56309UM D 2 1 SECTION 2 SIGNAL CONNECTION DESCRIPTIONS ...
Страница 85: ...2 38 DSP56309UM D MOTOROLA Signal Connection Descriptions OnCE JTAG Interface ...
Страница 86: ...MOTOROLA DSP56309UM D 3 1 SECTION 3 MEMORY CONFIGURATION ...
Страница 104: ...MOTOROLA DSP56309UM D 4 1 SECTION 4 CORE CONFIGURATION ...
Страница 124: ...MOTOROLA DSP56309UM D 5 1 SECTION 5 GENERAL PURPOSE I O ...
Страница 125: ...5 2 DSP56309UM D MOTOROLA General Purpose I O 5 1 INTRODUCTION 5 3 5 2 PROGRAMMING MODEL 5 3 ...
Страница 128: ...MOTOROLA DSP56309UM D 6 1 SECTION 6 HOST INTERFACE HI08 ...
Страница 166: ...MOTOROLA DSP56309UM D 7 1 SECTION 7 ENHANCED SYNCHRONOUS SERIAL INTERFACE ESSI ...
Страница 212: ...MOTOROLA DSP56309UM D 8 1 SECTION 8 SERIAL COMMUNICATION INTERFACE SCI ...
Страница 241: ...8 30 DSP56309UM D MOTOROLA Serial Communication Interface SCI GPIO Signals and Registers ...
Страница 242: ...MOTOROLA DSP56309UM D 9 1 SECTION 9 TRIPLE TIMER MODULE ...
Страница 269: ...9 28 DSP56309UM D MOTOROLA Triple Timer Module Timer Operational Modes ...
Страница 270: ...MOTOROLA DSP56309UM D 10 1 SECTION 10 ON CHIP EMULATION MODULE ...
Страница 302: ...MOTOROLA DSP56309UM D 11 1 SECTION 11 JTAG PORT ...
Страница 369: ...C 22 DSP56309UM D MOTOROLA DSP56309 BSDL Listing ...
Страница 370: ...MOTOROLA DSP56309UM D D 1 APPENDIX D PROGRAMMING REFERENCE ...
Страница 405: ......
Страница 409: ......