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For current information contact Analog Devices at (781) 461-3881
ADSP-2192 October 2000
This information applies to a product under development. Its characteristics and specifications are subject to change with-
out notice. Analog Devices assumes no obligation regarding future manufacturing unless otherwise agreed to in writing.
32 REV. PrA
to PCIVAUX and VCTRLVDD will switch off the primary
supply. USB applications may require an external high-effi-
ciency switching regulator to generate the 2.5V supply for
the ADSP-2192.
Low Power Operation
In addition to supporting the PCI and USB standard’s
power down modes, the ADSP-2192 supports additional
power down modes for the DSP core’s and peripheral
buses. The power down modes are controlled by the DSP1
and DSP2 Interrupt/Powerdown registers.
Clock Signals
The ADSP-2192 can be clocked by a crystal oscillator. If a
crystal oscillator is used, the crystal should be connected
across the XTALI/O pins, with two capacitors connected as
shown in Figure 8 on page 33. Capacitor values are depen-
dent on crystal type and should be specified by the crystal
Figure 6. ADSP-2192 Boot Process Flow
DSP EMERGES FROM ~RESET AND
PROGRAM FLOW JUMPS TO BOOT ROM
LOADER KERNEL READS CRST PINS AND DETERMINES MODE
OF BOOTING; ALSO PERFORMS HOUSEKEEPING
OPERATIONS, SETTING UP INTERRUPTS, ETC.
LOADER KERNEL READS BUS MODE PINS TO SET UP
BUS CONFIGURATION
CALL SUBROUTINE TO AUTO-
DETECT SERIAL EEPROM
SERIAL
EEPROM
EXISTS?
DETERMINE 8 OR 16-BIT?
SPI OR MICRO-WIRE?
TRANSFER CONTROL TO PCI
OR USB TO FACILITATE REST
OF BOOT
NO
YES
LOAD SERIAL EEPROM CONFIGURATION AND DATA PACKETS
LOAD PCI/USB CONFIG REGISTERS ACCORDINGLY
AFTER BOOTING IS COMPLETE, USER
HAS OPTION TO EITHER RETURN TO
SERIAL EEPROM OR JUMP TO USER
CODE AND BEING EXECUTION
DO ANY SERIAL
EEPROM NEED TO
BE EXECUTED?
NO
YES
EXECUTE PACKETS
FINISH
Figure 7. ADSP-2192 2.5V Regulator Options
+
-
VREF
IVDD
VCTRLVDD
VCTRLAUX
PCI VDD
DSP
INTERNAL
CIRCUIT
EXTERNAL
COMPONENTS
2.5V @ 500MA 3.0V -> 5.5V
3.0V -> 3.6V
PCI VAUX
ZETEX
FZT951
ZETEX
FZT951
TANTALUM
OR
ELECTROLYTIC
CERAMIC
10
µ
µµ
µ F
.1
µ
µµ
µ
F