MB86330 Datasheet, PDF (33/46 Pages) Fujitsu Component Limited. – 16-bit Fixed-point DSP

MB86330
s BOOT
1. BOOT Mode
BOOT mode supports the following functions.
• Ordinary BOOT function (Booting the instruction RAM (48 kwords)/the table RAM (16 kwords))
• Simplified BOOT function (Booting some instruction RAMs)
2. Setting BOOT Mode
Only single chip mode is available.
(1) Command Setup
Load the ERAM area (FFE0H to FFE3H: PAGE1-0 = 11) with the following contents during booting.
• Address FFE0: Command contents
0001H to 000BH : Reserved
000CH
: Simplified booting
000DH to 0010H : Reserved
Others
: Ordinary booting
• Address FFE1: Start address
Specify the start address of a program to be booted during simplified booting.
• Address FFE2: Size
Specify the program size of a program to be booted during simplified booting.
• Address FFE3: Execution start address
Specify an execution start address after completion of simplified booting.
(2) Ordinary BOOT function (Command = other than 0001H to 0010H)
The ordinary BOOT function loads a full-word program (48 kwords) and table data (16 kwords), then moves
execution to the user program (jump to address FFFE) or ICE (jump to address 0002).
(3) Simplified BOOT function (Command = 000CH)
The Simplified BOOT function loads and executes a program of 48 k or fewer words.
It also sets loaded start address (FFE1H), the number of program words (FFE2H), and execution start address
(FFE3H).
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