VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

ADSP-2106x/21160 Processor Booting
Table 3-5. ADSP-21065L Boot Mode Pins
Pin Type Description
BMS I/O/T 1 Boot memory select
When BSEL is low, BMS is an input pin and selects between host boot mode
and no-boot mode. In no-boot mode, the processor executes from external
memory. For no-boot mode, connect BMS to ground. For host boot mode,
connect BMS to VDD.
When BSEL is high, BMS is an output pin and the processor starts up in
EPROM boot mode. Connect BMS to the EPROM’s chip select.
BSEL I EPROM boot select
Hardwire this signal; it is used for system configuration.
When BSEL is high, the processor starts up in EPROM boot mode.
The processor assumes the EPROM data bus is 8 bits wide. Connect BSEL to
the processor data bus in LSB alignment.
When BSEL is low, BMS determines the booting mode. Connect BSEL to
ground.
1 Three-statable in EPROM boot mode (when BMS is an output).
Table 3-6. ADSP-21065L Boot Modes
BSEL BMS Description
0 1 No-boot mode.
The processor executes from external memory at location 0x20004.
0 1 Host boot mode.
The processor defaults to an 8-bit host bus width.
1 Output EPROM boot mode.
The processor assumes an 8-bit EPROM data bus width. Connect to the
data bus in LSB alignment.
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